cisco CP-7920 with linksys AP on CCME

Hi experts,

I am trying to hook up a new CP7920 phone to CCME via my Linksys accesspoint. The 7920 does not see an AP at all (my notebook runs fine over this AP). I checked and checked the 7920's settings again and again, but no succes :-(. The 7920 runs firmware 7920.3.3-01-06.

Any advice or hints will be appreciated !

Thanks Johannes