How to fix sound chopping problem in Vostro220

I am a technical Support person in an organization. And we are using Eyebeam and some other softwares for Voip calls. We never faced any voice break issue untill we deployed Dell Vostro 220 in our office. It is only with this model that when we use Eyebeam voip software the voice breaks. While voice works fine when we use any other software. Any idea whats the conflict between Eye beam and Dell Vestro?
We have reinstalled sound driver numerous times and also select the sound device name from Eye beam audio tuning wizard. Please help