>First thing I would check is if the ODBC driver that is mentioned in the connection string is installed on the second PC.
>

Thanks, I'll double check that, but it doesn't explain why I would be able to connect using the ODBC Administration utility.

That has made me think though and this is the connection string I use:

Data Source=XXXXXXXXXXXXX; Initial Catalog=BPOptical; Integrated Security=false; User Id=xxxxxx; Password= xxxxxxxxx

Which does not specify a driver, so maybe the PC that is not working is picking up a different ODBC driver than the other one because I did not specify the correct one?

Does that make sense?

Should I add in a Driver=My Driver to my connection string?