can't get to report manager

My company recently upgraded to CRM 3.0 and i was trying to get to the report
manager page in my browser to make custom reports. Unfortunately, whenever i
try to go to the report manager page i get the error listed below. Has anyone
ever seen this before? Thanks in advance for any help you can give me.
Server Error in '/ReportMgr' Application.
----
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: Assembly microsoft.crm.platform.proxy.dll security
permission grant set is incompatible between appdomains.
Source Error:
Line 15: <add assembly="Microsoft.Crm.ObjectModel, Version=3.0.5300.0,
Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 16: <add assembly="Microsoft.Crm.Platform.ComProxy,
Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 17: <add assembly="Microsoft.Crm.Platform.Proxy,
Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 18: <add assembly="Microsoft.Crm.Platform.Server,
Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 19: <add assembly="Microsoft.Crm.Platform.Sdk, Version=3.0.5300.0,
Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Source File: c:\inetpub\wwwroot\web.config Line: 17
----
Version Information: Microsoft .NET Framework Version:1.1.4322.2300; ASP.NET
Version:1.1.4322.2300did you solve this problem I am seeing something similar?
"ACreel" wrote:
> My company recently upgraded to CRM 3.0 and i was trying to get to the report
> manager page in my browser to make custom reports. Unfortunately, whenever i
> try to go to the report manager page i get the error listed below. Has anyone
> ever seen this before? Thanks in advance for any help you can give me.
> Server Error in '/ReportMgr' Application.
> ----
> 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: Assembly microsoft.crm.platform.proxy.dll security
> permission grant set is incompatible between appdomains.
> Source Error:
>
> Line 15: <add assembly="Microsoft.Crm.ObjectModel, Version=3.0.5300.0,
> Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
> Line 16: <add assembly="Microsoft.Crm.Platform.ComProxy,
> Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
> Line 17: <add assembly="Microsoft.Crm.Platform.Proxy,
> Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
> Line 18: <add assembly="Microsoft.Crm.Platform.Server,
> Version=3.0.5300.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
> Line 19: <add assembly="Microsoft.Crm.Platform.Sdk, Version=3.0.5300.0,
> Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
>
> Source File: c:\inetpub\wwwroot\web.config Line: 17
>
> ----
> Version Information: Microsoft .NET Framework Version:1.1.4322.2300; ASP.NET
> Version:1.1.4322.2300