MagicJack keeps disrupting audio

[Amountstax]

I've had my MagicJack for a year now but, the past month it keeps disrupting my audio.

What happens is a few calls will work then all of a sudden, the audio on my phone will come from my t5710 thin client's on board speaker, instead of coming threw my phone speakers.

What I have to do when this happens is restart the Thin Client and it'll work properly for a few calls.

Has anyone had this problem? If so how did you solve it?

I tried reinstalling the USB audio driver. Also thinking maybe my Thin Client didn't have enough memory to accommodate MagicJack updates I followed VaHamm's guide to set-up a DOK.

Still neither of these things have resolved the issue, Please Help!
Stax