Noise & Crackle when playing sounds

[ckd]

Hi everyone,

I am new here and hope to explain things properly.

I have a VIRUS TI Desktop, RME Fireface 400, Macbook Pro, Logic Pro 9.1.8.

I run the Virus via USB into the computer.

Every sound I play comes out with a noise and crackle which keeps going for a few seconds after the sound has stopped.

I have uploaded a file test here for you to have a listen to, so you know what I mean. http://www.mediafire.com/download.php?lyjeto35fe32xa7

I have tested it with headphones (not through the soundcard) and it still does it. I have also tried with another soundcard, a MOTU Ultralite, and it still didn't fix it.
I have tried to open the VIRUS in ABleton, and the noise is still there, so it is definitely a problem with the VIRUS.

At this stage I cannot get any work done because the sounds that come out of the VIRUS are like corrupted, so need this fixed ASAP.

Hope someone can help

Thanks you

Ckd