Android USB drivers not functioning.

I'm trying to use the SWM and when I have everything all set up it tells me I have no device set up. I looked to see if I could find drivers for me Xperia X10 and all I kept getting linked to was the sony PC companion that apparently had those drivers installed. When I installed it and did all the set up stuff it still wouldn't recognize my phone other than as a removable disk. I have the USB debugging turned on, .Net framework installed, and supposed the drives yet it still won't read my phone.

Check how your phone is visible in hardware menager, check if you don't have any extra USB crap turned on in phone settings,check if adb from Android SDK detect your phone