Hi,
Try the following...
1. Check if there is any "Lock file" in the same name of the database!! If there delete it.
2.Create a new blank database and import all the objects to it one by one. First tables, run the database, then queries, run, then Forms, run...
By this you will understand which object is corrupted... If possible import one object at a time...
3. Go to the code window and compile..Then Repair and Compact Database...
Hope this will help a little
Regards
Zameer