sounds drag out slooooowwwww

[pat101]

Playing only a 3 piece percussion loop. The sounds don't sound at all real ( they sound great with LMMS on a friends laptop) and drag out really slow the shaker is like sssssccccchhhhhhhhhhhh. Tempo 140 beat 4/4.
System: Win7 64 bit latest patches. i7 3ghz processor 12 gig RAM, nothing else running / disabled anti virus. LMMS 4.10 ( from 64 bit download link) turned off chanel activity indicator and have played with buffer to no avail.
Any ideas ??
Thank you

[musikbear]

they sound great with LMMS on a friends laptop

what OS is that?
Unfourtunately 64 bit has been a drag.
Otherwise, things like hardware-acceleration could be a colpit, but other apps, like games on your pc runs ok? right?
What you could try was to run the 32bit version. If that is a succes, do post here again.
Br.