title: Paypal Api Redirection Headers issue
body: <p>I am working Paypal with using API.  I am getting error like this. I searched in Google.. i got only one suggestion regarding paypal api credentials. but the below code is working in another server. can anybody tell me what may be the reason.Thanks inadvance</p>
  
  <pre><code>        Error : Security header is not valid
          Array
          (
              [TIMESTAMP] =&gt; 2014%2d02%2d10T16%3a09%3a39Z
              [CORRELATIONID] =&gt; 6df53789eb1fb
              [ACK] =&gt; Failure
              [VERSION] =&gt; 76%2e0
              [BUILD] =&gt; 9605603
              [L_ERRORCODE0] =&gt; 10002
              [L_SHORTMESSAGE0] =&gt; Security%20error
              [L_LONGMESSAGE0] =&gt; Security%20header%20is%20not%20valid
              [L_SEVERITYCODE0] =&gt; Error
          )
  </code></pre>