Hi guys! Has anyone successfully setup their SIP account on the N9, and make it work over 3.5G (HSDPA) connection?

I'm buffled as to why I cannot create a connection over 3.5G while I could over WiFi.

The fact is, I can do this on my Nokia E66 (using the same SIM card without any problem. Perhaps I just missed something in the settings?

Anyone in the know care to chime in? Thanks!