Unable to connect vodafone gprs on pc

Im from India,using vodafone gprs but after several tries I could not connect net by using nokia pc suite on my computer.I use nokia 5230 as a modem.I have changed pc suite"s APN several times from WWW to vodafone mobile connect but in vein.Also i have used nokia ovi suite but the situation is same.Although Im surfing net with my mobile comfortably by putting APN www/Vodafone Mobile Connect.It gives me good downloading(max 112 kbps) and surfing speed.I have tried dial up connection and also used bluetooth dongle but the situation is same.Plz help me.NAMASKAR.