Help with feedback using Teamspeak (don't have it using Ventrilo)

[Elrandir]

Hiya, my new guild has a Teamspeak server and a Ventrilo server, I'm used to using ventrilo and have no feedback using a logitech cam as a mic. However when testing audio on Teamspeak I have a crazy amount of feedback and mic squeal and can't find how to fix it yet, does anybody have an idea which settings or other tweaks can help me out? I reckon if Vent doesn't have any problems with the mic Teamspeak shouldn't either? I'm using push-to-talk for both programs. Thanks in advance.

What i've tried already:
mic boost is off
in playback speaker options, mic is muted on levels tab

[Butler to Baby Sloths]

Options --> Capture --> Capture Device --> set the microphone instead of the default device

[Elrandir]

Thanks but it didn't help, same effect. Any other ideas?