Nexus One doesn't see wireless network

This is a very active forum so Ill try this here. My N1 wont see a very important wireless network. I've tried with 2.3.6, CM6 and CM7 and I flashed my phones radio to the latest version and my phone still doesn't see the network. Every other smartphone and wireless device connects without any issue. The access point is provided by a Fortiwifi 60c server. Has anyone else had this problem?