Vatsim bad stuttery output quality

Hi since i built my new PC and installed vatsim the output quality is really bad. The Output is so stuttery that i can not understand the atc.I dont really know what to do i reinstalled vpilot many times and it doesnt help. I have a pretty strong internet connection too and i forgot to say it disconnects me all the time from the voice server evrey 5-10 min.

What sim are you using?
What do you mean the output is stuttering, do you mean the voice you are receiving breaks up and does it do it all the time?