Sync problem with midi compared to other plugins

[gabbe]

Hi I have had this same problem since I bought my virus.
When I play a simple loop in fruity loops with a kick, say BPM 135, and with a virus lead midi on that.
This is when I get this problem, the midi seems not to be in sync to the rest of the loop. Often it helps to move the midi so it fits the rest of the loop, but do I have to do this every time?

If I play a random vst synth with a simple melo it fits the loop, but if I take the same midi and play it from my virus it goes out of sync. Even if I move the midi it sometimes sounds a bit strange. But its just the virus who do this "out of sync thing", and not any other plugin that I use. So it must be something I've missed about this.

I plugged in my virus with the USB.
Maybe its a simple answer to this but I'm still a noob so