OPManager database problem

I ran repairDB.bat andd got following responnse:
============
myisamchk: MyISAM file ..\mysql\data\OpManagerDB\alert.MYI
myisamchk: warning: 1 clients is using or hasn't closed the table properly
myisamchk: MyISAM file ..\mysql\data\OpManagerDB\devicetoeventlogrulemap.MYI
myisamchk: warning: 1 clients is using or hasn't closed the table properly
myisamchk: MyISAM file ..\mysql\data\OpManagerDB\event.MYI
myisamchk: warning: 1 clients is using or hasn't closed the table properly
myisamchk: MyISAM file ..\mysql\data\OpManagerDB\event.MYI
myisamchk: warning: Datafile is almost full, 4275559676 of 4294967294 used
myisamchk: error: Record at pos: 3667964656 is not remove-marked
myisamchk: error: record delete-link-chain corrupted
===========
How to fix it?
Thanks!