Originally Posted by MikePhoenix
Just tried it with my old Nexus One and it worked without a hitch. So it is not a problem with the way I have the SDK setup, it is a problem with the Samsung device.
Well that's strange. Did you use the same cable with both phones? Are you using the usb cable that came with the GS2?
Try these drivers
and see if it makes any difference. They are older drivers and I'm not sure it would help.