DI Server Error Creating Sales Quotation

¡Hi everybody!

I'm trying the DI Server samples in order to create Sales Quotations but web method AddQuotation doesn't work. It returns the following error code: "-2053 Could not generate XML Schema". Looking into error list code, I see this error code stands for Invalid Object. I also tried the Busines Partners sample and it works just fine. I don't see any difference between generated xml on both examples, except of course the fact both are different business objects. I mean, the SOAP message structure looks correct. Does anyone know something about it?

Right now I'm testing under SAP BO 2005 SP01 pl 4. Development environment C# 2005.

Thank you very much!!