Steinberg CI1 + Headset Mic Setup

Hello

Ive had the CI1 for a while now that i have been using with my guitar. Which works perfectly, what i have been struggling with tho is using a mic on it. I use skype alot and its really a pain to have to plug my mic in the computer to get it to work. I use Sennheiser PC360 as my headset when i use skype. Im using a TRS jack converter for the mic and i doesnt work. Ive searched all over the net to find a solution but find nothing. And i was wondering what the problem is? If anyone can help that would be awesome.

It seems that there’s really no information about this issue…
If you found a solution, please tell us here. I really hate that I can’t use my sound card with the small mics (as headphones ones)…