Subject internal gds consistency...

I have a database that had some problems. I took the last backup and did
restore. The process worked fine without any error messages. So I
started client application again and surprise! I've got Internal gds
consistency check (can't continue after bugcheck).

The backup and restore was done with FB SS 2.0.1, after I installed the
FB SS 2.0.2 and the problem still exists :(
The page size is 16384, allocated pages 2947173, transaction id is very
low (as it is after restore). ODS=11.0;

In a server log file I found:
pointer page vanished from DPM_next (249), file: dpm.cpp line: 1609

Any idea what to do with this problem?

Best regards,