Just FYI, I have noticed a change in this behaviour with OS2008 (at least in RX-44_2008SE_1.2007.42-18). All the root certs that ship with OS2008 are pre-set to be Trusted for WLAN (not for E-mail or Browser). So there should no longer be a need to manually set the WLAN Trust checkbox, unless you need to import a new root certificate (eg. if you are using a private CA). technut wrote: > You get the "can't find a certificate to validate the server" error > message if you either don't have the matching root cert, or if it > isn't enabled for WLAN connections. > > If you can figure out which CA your Radius server certificate is from > (eg. Entrust? Verisign? ask the Radius admin guys), then go into > Control panel / Certificate manager / Authorities tab and you'll > probably see the root certificate that matches the Radius cert. > Select it and choose Trust, then check the WLAN box. >