Error with Reports in Portfolio Server 2007 SP1

[Cnegroni]

Hi:

My problem is the following: Portfolio Server 2007 with SP1 was working
without problems but a week ago when you try to use one of the reports
defined in the Reports section of Portfolio Server you got an error in the
web page and the Event Viewer shows the following:

Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1310
Date: 6/19/2009
Time: 6:03:37 PM
User: N/A
Computer: ABCLSCL092
Description:
Event code: 3008
Event message: A configuration error has occurred.
Event time: 6/19/2009 6:03:37 PM
Event time (UTC): 6/19/2009 10:03:37 PM
Event ID: 01e9f56a6f23484a983df6528a141fe9
Event sequence: 4
Event occurrence: 3
Event detail code: 0

Application information:
Application domain:
/LM/W3SVC/1272002293/root/ReportServer-2-128899213880625000
Trust level: Full
Application Virtual Path: /ReportServer
Application Path: e:\SQL2005\MSSQL.1\Reporting Services\ReportServer\
Machine name: ABCLSCL092

Process information:
Process ID: 2788
Process name: w3wp.exe
Account name: SANCMD\XsSQLPortFolio

Exception information:
Exception type: ConfigurationErrorsException
Exception message: Could not load type
'Microsoft.Office.Project.PortfolioServer.PSWA.ModularArchitecture.Redirector'.
(E:\Inetpub\PortfolioServer\web.config line 66)
(E:\Inetpub\PortfolioServer\web.config line 66)

Request information:
Request URL: http://localhost/ReportServer
Request path: /ReportServer
User host address: 127.0.0.1
User:
Is authenticated: False
Authentication Type:
Thread account name: SANCMD\XsSQLPortFolio

Thread information:
Thread ID: 7
Thread account name: SANCMD\XsSQLPortFolio
Is impersonating: False
Stack trace: at System.Web.Configuration.HttpModuleAction.get_Entry()
at System.Web.Configuration.HttpModulesSection.CreateModules()
at System.Web.HttpApplication.InitModules()
at System.Web.HttpApplication.InitInternal(HttpContext context,
HttpApplicationState state, MethodInfo[] handlers)
at
System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext
context)
at System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext
context)
at System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr)

What can I do to resolve this?

Any help would be appreciated

Thanks

Regards

Carlos Negroni