Motorola KRZR K1

i bought this motorola KRZR k1 Silver online but can not seem to get the mms settings right for cingular. Also when i try to access the web it says that gprs network is not available then asks if i want to attempt direct data call? i say yes but then the gprs message appears again. i know this has to do with my mms problem as well. mms is so very important to me. if you could please healp