I click on Data Manager and nothing happens

Reboot your computer.  Once the computer has come back up, DO NOT try to open Data Manager.  Open Windows Explorer, locate the c:\wintes32 folder.  Locate the tdata folder.  Delete the files master.adf and master.ndx.  Once those files are deleted, open Data Manager, say Yes when asked to Rebuild.
This should clear up the problem.

en_GBEnglish
en_GBEnglish