u must hv got a cd wit ur cable ...so install drivers for modem from that of ur device....next install the sony ericsson software (manager, connection wizard, mms etc) in ur pc....then u need to setup ur internet connection from that se software....and connect...ur done...
ps:-
1> u may not need to install drivers as it wud be installed automatically wit d se s/w
2>warning: dont keep much expections for speed from that connection...