Default T-r42 & skype & logitech c270

Hello,
i recently bought the T-R42 and the webcam Logitech C270

I installed the latest version of Skype, and set up the auto accept of the calls

I see a random behaviour: the video call sometimes works,
sometimes seems skype crashes (and is shown on the lower right corner 'skype not connected')

I dont know why...
anyone knows on what this depends?...
perhaps latest version of skype is not fully compatible with the T-R42?

i read somewhere that previous version (skype 3.2) was working better... is it true?

Any suggestion?

Thanks!!