When installing DeviceLock Enterprise Server on 64-bit OS, 'System data sources' field in 'Connection type' section is empty, or user DSNs without system DSNs are displayed.
There are two independent lists of system data sources for both 32-bit and 64-bit applications.The 64-bit version of ODBC Data Source Administrator tool is started from the Control Panel, so that its data sources are not available for DeviceLock Server (being a 32-bit application).
To create 32-bit application system data sourcesб one must start the 32-bit ODBC Data Source Administrator tool version manually.
Note The 32-bit version of the Odbcad32.exe file is located in the %systemdrive%\Windows\SysWoW64 folder.
More information about this issue: http://support.microsoft.com/kb/942976