title: Magento - Adminhtml new custom Tab in the config section is not showing up
body: <p>i'm using Magento 1.9.0.1 and right now i am working on a new extension and i want to add new module with tab in the admin panel.</p>
  
  <p>Here is what i've done so far:</p>
  
  <p>/app/code/community/VivasIndustries/SmsNotification/etc/config.xml:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;config&gt;
    &lt;modules&gt;
      &lt;VivasIndustries_SmsNotification&gt;
        &lt;version&gt;0.1.0&lt;/version&gt;
      &lt;/VivasIndustries_SmsNotification&gt;
    &lt;/modules&gt;
    &lt;global&gt;
      &lt;models&gt;
          &lt;smsnotification&gt;
              &lt;class&gt;VivasIndustries_SmsNotification_Model&lt;/class&gt;
          &lt;/smsnotification&gt;
      &lt;/models&gt;  
      &lt;events&gt;
          &lt;sales_order_save_after&gt;
              &lt;observers&gt;
                  &lt;vivasindustries_smsnotification&gt;
                      &lt;class&gt;smsnotification/observer&lt;/class&gt;
                      &lt;method&gt;orderSaved&lt;/method&gt;
                  &lt;/vivasindustries_smsnotification&gt;
              &lt;/observers&gt;
          &lt;/sales_order_save_after&gt;
      &lt;/events&gt;
    &lt;/global&gt;
    &lt;adminhtml&gt;
      &lt;acl&gt;
          &lt;resources&gt;
              &lt;all&gt;
                  &lt;title&gt;Allow Everything&lt;/title&gt;
              &lt;/all&gt;
              &lt;admin&gt;
                  &lt;children&gt;
                      &lt;system&gt;
                          &lt;children&gt;
                              &lt;config&gt;
                                  &lt;children&gt;
                                      &lt;vivas&gt;
                                          &lt;title&gt;Vivas - All&lt;/title&gt;
                                      &lt;/vivas&gt;
                                  &lt;/children&gt;
                              &lt;/config&gt;
                          &lt;/children&gt;
                      &lt;/system&gt;
                  &lt;/children&gt;
              &lt;/admin&gt;
          &lt;/resources&gt;
      &lt;/acl&gt;
  &lt;/adminhtml&gt;
  &lt;/config&gt;  
  </code></pre>
  
  <p>Here is what i have in:
  /app/code/community/VivasIndustries/SmsNotification/etc/system.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;config&gt;
      &lt;tabs&gt;
          &lt;vivas translate="label" module="vivasindustries_smsnotification"&gt;
              &lt;label&gt;Vivas Extensions&lt;/label&gt;
              &lt;sort_order&gt;100&lt;/sort_order&gt;
          &lt;/vivas&gt;
      &lt;/tabs&gt;
      &lt;sections&gt;
          &lt;vivas translate="label" module="vivasindustries_smsnotification"&gt;
              &lt;label&gt;Extension Options&lt;/label&gt;
              &lt;tab&gt;vivas&lt;/tab&gt;
              &lt;sort_order&gt;1000&lt;/sort_order&gt;
              &lt;show_in_default&gt;1&lt;/show_in_default&gt;
              &lt;show_in_website&gt;1&lt;/show_in_website&gt;
              &lt;show_in_store&gt;1&lt;/show_in_store&gt;
  
              &lt;groups&gt;
                  &lt;vivas_group translate="label" module="vivasindustries_smsnotification"&gt;
                      &lt;label&gt;My Extension Options&lt;/label&gt;
                      &lt;frontend_type&gt;text&lt;/frontend_type&gt;
                      &lt;sort_order&gt;1000&lt;/sort_order&gt;
                      &lt;show_in_default&gt;1&lt;/show_in_default&gt;
                      &lt;show_in_website&gt;1&lt;/show_in_website&gt;
                      &lt;show_in_store&gt;1&lt;/show_in_store&gt;
  
                      &lt;fields&gt;
                          &lt;vivas_input translate="label"&gt;
                              &lt;label&gt;My Input Field: &lt;/label&gt;
                              &lt;comment&gt;My Comment&lt;/comment&gt;
                              &lt;frontend_type&gt;text&lt;/frontend_type&gt;
                              &lt;sort_order&gt;20&lt;/sort_order&gt;
                              &lt;show_in_default&gt;1&lt;/show_in_default&gt;
                              &lt;show_in_website&gt;1&lt;/show_in_website&gt;
                              &lt;show_in_store&gt;1&lt;/show_in_store&gt;
                          &lt;/vivas_input&gt;
                          &lt;vivas_select translate="label"&gt;
                              &lt;label&gt;My Dropdown: &lt;/label&gt;
                              &lt;comment&gt;Source model provider Magento's default Yes/No values&lt;/comment&gt;
                              &lt;frontend_type&gt;select&lt;/frontend_type&gt;
                              &lt;sort_order&gt;90&lt;/sort_order&gt;
                              &lt;show_in_default&gt;1&lt;/show_in_default&gt;
                              &lt;show_in_website&gt;1&lt;/show_in_website&gt;
                              &lt;show_in_store&gt;1&lt;/show_in_store&gt;
                              &lt;source_model&gt;adminhtml/system_config_source_yesno&lt;/source_model&gt;
                          &lt;/vivas_select&gt;
                      &lt;/fields&gt;
                  &lt;/vivas_group&gt;
              &lt;/groups&gt;
          &lt;/vivas&gt;
      &lt;/sections&gt;
  &lt;/config&gt;
  </code></pre>
  
  <p>Here is what i have in: /app/code/community/VivasIndustries/SmsNotification/Helper/Data.php:</p>
  
  <pre><code>&lt;?php
  class VivasIndustries_SmsNotification_Helper_Data extends Mage_Core_Helper_Abstract 
  {
  
  }
  </code></pre>
  
  <p>With this done i receive the following error when i open my admin panel:</p>
  
  <p>Fatal error: Class 'Mage_Vivasindustries_Smsnotification_Helper_Data' not found in /home/superweb/public_html/store/app/Mage.php on line 547</p>
  
  <p>When i change the name of the FOLDER <code>SmsNotification</code> to <code>Smsnotification</code> this error is gone, but there is any new tab in the System->Configuration...</p>
  
  <p>So guys can you help me out to create a new tab in the Admin panel ?</p>
  
  <p>Thanks in advance!</p>