I'm trying to open a Crystal Report ( with subreports) from VB and I'm
getting an error "Cannot open SQL Server".
If I saved one subreport like a report is working. So, for some reason I
can't pass the parametres for a report with subreports.

Can someone to help me? Maybe some VB sample code will help.

Thanks in advance,
Marius

Try this:

SCR8_VB_RDC_Subreports.exe
This sample Microsoft Visual Basic 6 application uses the Report Designer
Component to demonstrate how to dynamically set properties of a subreport.
This application is for use with Crystal Reports 8 or higher.

http://support.crystaldecisions.com/communityCS/FilesAndUpdates/scr8_...
subreports.exe.asp

Jonathan