1. Understanding the 32-bit vs. 64-bit ODBC Administrator Windows 7 64-bit has two separate ODBC Data Source Administrators. Using the wrong one is the #1 cause of "driver not showing up" errors.

C:\Windows\SysWOW64\odbcad32.exe /a To test a DSN via PowerShell (64-bit):

C:\Windows\System32\odbcad32.exe /a To list 32-bit drivers: