Gameserver crash

I use MBT 97d+99i+custom.
My gameserver crashed after some hours sometimes, and i don't know why.

19:38:50 Experience : [zzz][Doomer](160) 42899417 1287
19:38:50 Experience : [zzzzz][Maladoy](137) 26858533 1104
19:38:51 Experience : [zzz][Wolf](118) 17512860 507
19:38:51 Item Lost (Zen:463/level:0/skill:0)
19:38:53 Item Lost (Zen:463/level:0/skill:0)
19:38:55 Item Lost (Dragon Armor:257/level:0/skill:0)
19:38:58 Experience : [zzz][Doomer](160) 42900704 1146
19:38:58 Experience : [zzzz][Maladoy](137) 26859637 981
19:38:58 Experience : [zzzzz][Wolf](118) 17513367 528
19:39:03 Experience : [zzz][Doomer](160) 42901850 1347
19:39:03 Experience : [zzzz][Maladoy](137) 26860618 1155
Monster Item Drop [4][53][93] : serial:121169 [Life Swelling Orb][0][1][1][0] Ex:[0,0,0,0,0,0,0]
19:39:04 Item Lost (Legendary Staff:165/


this is the end of log
mb something to turn off? liek checksum of MBT?

yes you may try with turning of checksum but i doubt its from there. Im not really familliar with MBT 97d but if i last recall they were good and stable. Also the last lines of this .log file are from monster drop which means you dropped something or killed monster with messed up drop rate.

it's not like 1st time kill that monster, some ppl there stay with hours. so i think it's not from drop..