Sorry, I can only tell you what worked for me. a) The only way I know of to be sure which CA root cert to Trust is by asking your system guys which cert vendor is providing the cert for the Radius server. In your case if they are acting as their own CA, then their root cert needs to imported (as you have done) and then Trusted for WLAN (as you have done). b) I know there is a checkbox setting in Windows to enable/disable server cert checking on connections... not sure about the others. There doesn't seem to be any equivalent setting on OS2007. I don't have any other ideas for you, sorry. As you know, it will still connect if you click the OK on the warning message before the connection times out. technut Peter Flynn wrote: > technut wrote: >> Did you follow the steps in my first answer? ie. Go into Control >> panel / Certificate manager / Authorities tab.... Select the cert >> and choose Trust, then check the WLAN box. > > Yep. Mail, Browser, and WLAN were already checked. > >> Worked for me on N800 / OS2007. > > That's what I have. It's still popping up the complaint. > > a) how do I tell it which cert to use for which connection? > > b) why is it even checking for a cert? I didn't ask it to. > No other system (Win, Mac, Ubuntu) I use on this network does this. > > ///Peter >