Oh holy cow of embarrassment....You are on a 64bit machine and trying to setup a DSN to a 32bit machine right? The DSN utility on a 64bit machine creates a 64bit DSN and you need the 32bit version.
The 32bit ODBC can be found at: %systemdrive%\Windows\SysWoW64\odbcad32.exe
You will notice when open this up that the DSNs you already created are not there. Let me know if that is the issue.
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