Normally this error comes when you use compact and repair utility from access tool menu. It's one of the hidden System tables. Your database is probably corrupt; create a new, empty database. Go to File menu-> Get External Data-> Import. Now you can import every valid table. This will give you a clean set of systems tables;
If this still doesn't work, you can try some professional tools. you can try a utility called Advanced Access Repair to repair your Access MDB file. It works rather well for my corrupt Access MDB files. Its web address is
http://www.datanumen.com/aar/
Hope this helps.