slow motion problem with super mario bros. brawl

[vandire]

hello my sys req
2.4ghz Qcore 6600
9400gt nvidia
4gb ddr2 ram
operation: xp media center edition sp3

emu builds r5063 r4771 r4897
the problem with that game it runs good until it is 4man fighting it run in very slow motion until 2 of them dies or so

however at the main screen i saw cpu match has 4man battle that didn't have a slight of slow motion
so what the hell?

[Ocean]

Framelimit to off from auto