Follow these steps and it shud fix it:
1. Open your mirserver folder
2. Open mud2 folder
3. Open FDB folder
4. Delete everything in FDB folder
5. Go back into mud2 folder
6. Open logsrv folder
7. Open IDDB folder
8. Delete everything in IDDB folder
This should work, but if it doesnt then theres something wrong with yourv IPs or txt files
/King