Note that when RadCompression is enabled and you are using .NET 4.0, event handlers might not be raised in a default document in IIS 7 or IIS 7.5 Integrated Mode. This problem is caused by a breaking change in .NET 4.0 described here
. To workaround it one can set preCondition="managedHandler"
for the RadCompression module. You may also need to remove the runAllManagedModulesForAllRequests
setting from your web.config if you have it (or set it to false).
I hope this helps.
the Telerik team
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