we had this problem in Enterprise version 8 and Enterprise version 9

the QODBC driver is authorized for autologin and the FlexQuarters driver can be seen in Integrated Applications.

both Excel and Access can connect to the QuickBooks data using the QODBC connection without any problems.

when we try to connect using a custom visual basic application which calls the QODBC DSN we receive a message stating the application cannot change its properties in the company setup and the connection fails.

the code is as follows:

Sorry your description of the actual error message isn't concise. I would need to know the exact error message. As far as the connection string is concerned, it needs to state the QuickBooks company file to open like this:-

Dim csQuickBooks As String ="DSN=Quickbooks Data;DFQ=C:\foldername\companyfilename.qbw;OLE DB Services=-2;"

See: How do I build a connection string with all the available QODBC parameters? for more info. As you are using Visual Basic 2005, see this: VB 2005 Express Edition And QODBC also!!!