please do me a huge favor :(

I have the problem that, I have a problem with protools.
For some reason the duc.digidesign.com forum won't let me register.

I tried several times!

So, if somebody is registered there, it would be nice if you could post this messege, because I need help

First of all, here is my set-up:

mpc2500 connected via stereo out to the input1 and input2 of the mboxmini.
Mboxmini connected via USB to my iMac.

Everything works just fine, I use the output of the mbox with my studio headphones.

But as soon as I start up protools, a quite, high noise appears.
It's constant and barely hearable. Still it is also there in the end, when I bounce the song to disk.

It can't be the hardware, cause' without protools on my screen everything sounds just fine. I'm new to protools!

Thanks in advance!

Thanks to whoever posts this in the duc.digidesign.com forums!

nevermind, it works now