Problems with .NET 1.1 - HttpModules and error pages

 Greetings!!!
 I'm facing the hardest thing on the web site i work for.
 The deal is: I have an aspx app that suddenlly went down (for no reason), and I'm not getting to turn off the custom error page. I undestand that this security arrangement passes trough an HttpModule, that i can't find as well.
 Please!! Help me!!! I'm getting desperated!!!

Here's my web config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="MySettings" type="ContentManager.HttpModuleLib.ConfigurationMap, ContentManager.HttpModuleLib" />
    </configSections>
    <appSettings>
        <add key="ConnectionString" value=
        &l ...