Invalid Class String Error

[tjherman]

I have built a web site with Visual Studio 2005 that uses Crystal Reports. I'm trying to load the application onto another server. I do a Publish on the website and the main aspx pages come up fine but when I try to run a Crystal Report, I get an error page talking about an Invalid Class String.

Here's the text on the error page:

Invalid class string

Exception Details: System.Runtime.InteropServices.COMException: Invalid class string

Stack Trace:
[COMException (0x80004005): Invalid class string]
CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.Open(Object& DocumentPath, Int32 Options) +0
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.Open(Object& DocumentPath, Int32 Options) +87
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened() +279

[Exception: Load report failed.]
CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened() +340
CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod, Int16 parentJob) +870
CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename) +73
rptContractView.Page_Load(Object sender, EventArgs e) +216
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061

CAN ANYONE HELP ME WITH THIS??? THANKS!!!