my server drops people "Not present on client 255"

[panth0ur]

When anyone tries to join to my server,they get this text HOst_Error: UserMsg: Not present on client 255 and drop then,PLEASE HELP

 

[Mikkel]

http://www.msremake.com/forums/viewtopic.php?f=2&t=5461

 

[Thothie]

Also: viewtopic.php?f=2&t=5433&start=0