Rollover Stickyness

I’ve read through the forums and didn’t find much on this. I created a simple rollover affect using this:

on (rollOver) {
    this.gotoAndPlay("over");
}
on (rollOut) {
    this.gotoAndPlay("out");
}
on(release) {
    getURL ("http://www.hu.mtu.edu/~bdstanle", _blank)
}

However, it works but only if I move my mouse over it slowly. If I go a bit quicker it stays in the hover mode. Non of the buttons are overlapping.

Here’s what I’m talking about: www.hu.mtu.edu/~bdstanle/header3.swf
What can I do?

Thanx in advance.