After installing VS 2003 sp1, Crystal Reports stops working

Dear Colleagues,

Does any body knows why after installing VS .Net 2003 sp1, Crystal Reports
stops working?

After the installation, when trying to open a late - version - good -
working report, I receive the following error:

1) Información de Excepción
**************************
Tipo excepción: System.Runtime.InteropServices.MarshalDirectiveException
Message: Restricción del contador de referencias: cadena demasiado larga.
TargetSite: Void ReadFromFile(System.String)
HelpLink: NULL
Source: CrystalKeyCodeLib

I would greatly appreciate any help on this subject

thanks

Mike