Strange behaviour of KNetworkManager

Hello,

I noticed a strange behaviour of my KNetworkManager working on Suse 11.2 updated with KDE 4.4.4. In fact, NM give me the possibility to configure only DSL, VPN and wired connections but the mobile broadband and wireless tags are completely disabled(grey colour). Is it the normal? Hints to fix the problem? I want to configure a mobile broadband connection using my PDA as modem but it seems at the moment no possible.
Thank you very much for your support.