I've got a couple of samsung phone, a S-I9000, and a s2-I9100, I had not problem setting up the S2-I9100 with the mobile tracking, but getting the S-I9000 set up, can't seem to make it work.
Going to the samsungdive web site, it tells me to turn the mobile tracking on, on the phone, it is, other times it says that my location isn't supported which I know is rubbish because my S2-I9100 works if I log in to the web site with it.