Tmobile US hotspot

[herbal]

hey, i have an unlimited data plan which includes the tmobile hotspots, there's a tmobile store right next door to my work so i use that hotspot. my problem is that it wont stay connected, all the time i have the manually enter my login info and keep logging back in. the browser asks me to save the login info but never actually does save it. is there anyway i can stay logged in? or at the very least have the browser save my login? i have no trouble staying connected to other wireless networks and my previous phone would always stay connected to the tmobile hotspot, anyone have some suggestions?
since tmobile US doesent carry any S60 devices they were of no help