Web Console - Security Exception Error

[FethS]

Hi,
I just wanted to test and implement Lansweeper suite, which sounds very promising to get an idea what is going on in our network.
The installation went fine. But unfortunatly I can't find a solution for the issue with the Web Console. When I want to open it I always get the error message: Server Error in '/lansweeper' Application. Security Exception Error. Details are:
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Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:
[SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
System.Web.HttpRequest.GetParamsWithDemand() +24
System.Web.HttpRequest.get_Params() +8722394
AjaxControlToolkit.ToolkitScriptManager.OutputCombinedScriptFile(HttpContext context) +236
AjaxControlToolkit.ToolkitScriptManager.OnInit(EventArgs e) +68
System.Web.UI.Control.InitRecursive(Control namingContainer) +333
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6785
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +242
System.Web.UI.Page.ProcessRequest() +80
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21
System.Web.UI.Page.ProcessRequestWithAssert(HttpContext context) +36
System.Web.UI.Page.ProcessRequest(HttpContext context) +8697682
ASP.default_aspx.ProcessRequest(HttpContext context) +4
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082
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Everything (lansweeper, SQL and IIS) is installed on the same machine. The lansweeper service is running with domain admin and required SQL database permissions. I'm using IIS 6.0 and SQL 2000 SP4.
'Connection Tester' and 'Configuration' are working fine.

Any ideas?

Cheers
Sascha

[Hemoco]

This is not an error reported before, I'll have to do some searching.