Web Interface Configuration

If there is a delay when the web interface first loads this is the fix.

This issue is caused by a CRL check sent to Verisign. If the Web Interface server cannot access the internet, the CRL check fails and times out.

Check in IIS for the ASP.net version that is in use with the Web Interface site.
Modify Aspnet.config  in the following directory
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727 (If Web Interface uses .Net framework v2.0.50727)
Add the following lines to your ASPNET.CONFIG or APP.CONFIG file:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <runtime>
        <generatePublisherEvidence enabled="false"/>
    </runtime>
</configuration>

Taken from  http://support.citrix.com/article/CTX117273