Server Error - Unverifiable assembly K2ROM

Hi,
I got this error when i try to browse the workspace/report.aspx. Please help!

Server Error in '/K2V3/Workspace' Application.
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Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Unverifiable assembly 'K2ROM' failed policy check.

Source Error:


[No relevant source lines]


Source File: machine.config Line: 258


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Version Information: Microsoft .NET Framework Version:1.1.4322.2300; ASP.NET Version:1.1.4322.2300