Drivers For Windows 7 64bit For Using Cell Phone As Modem?

I just installed Windows 7 64bit. I use a Samsung Rant m540 Cell Phone for my internet connection. I can't get high speed on my road so its a lot better than dial up. Any way I've used it for a few years and now I cant seem to get it installed. It works fine on other comps and I had a driver for win xp 64bit that works. I got it installed on the windows 7 and it shows up as the modem and says its working properly but it wont respond when I try to query the modem or connect to the internet. I am pretty sure I just need a driver for the windows 7 for the phone as modem. But Sprint does not have a driver or program which supports it and neither does Samsung which created the phone. I googled for at least 5 hours with no success ive tried a few differnt drivers and no luck.