Asp.net - <customErrors mode="Off"/> error when trying to access working webpage <p>I have created an asp.net webpage and have uploaded it onto a webserver. However when I try to view the page remotely, I get errors about the customerror tag in the web.config file. The page works locally with no errors or warnings. Also if I upload the page as a .html file, I can view it fine remotely. I have seen a lot of other people with this error, but the 'solutions' just say to change the customErrors tag to 'Off', which I have done and does not work, do you know is there an issue with the webserver or what could be the problem here? </p> <p><strong>Here is the error page:</strong></p> <blockquote> <p>Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error >settings for this application prevent the details of the application error from being >viewed remotely (for security reasons). It could, however, be viewed by browsers running >on the local server machine.</p> <p>Details: To enable the details of this specific error message to be viewable on remote >machines, please create a tag within a "web.config" configuration file >located in the root directory of the current web application. This tag >should then have its "mode" attribute set to "Off".</p> </blockquote> <pre><code>&lt;configuration&gt; &lt;system.web&gt; &lt;customErrors mode="Off"/&gt; &lt;/system.web&gt; &lt;/configuration&gt; </code></pre> <blockquote> <p>Notes: The current error page you are seeing can be replaced by a custom error page by >modifying the "defaultRedirect" attribute of the application's >configuration tag to point to a custom error page URL.</p> </blockquote> <pre><code>&lt;configuration&gt; &lt;system.web&gt; &lt;customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/&gt; &lt;/system.web&gt; &lt;/configuration&gt; </code></pre> <p><strong>And here is my web.config file:</strong></p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;configuration&gt; &lt;system.web&gt; &lt;customErrors mode="Off"/&gt; &lt;/system.web&gt; &lt;system.web&gt; &lt;compilation debug="true"/&gt; &lt;authentication mode="None"/&gt; &lt;/system.web&gt; &lt;/configuration&gt; </code></pre>