I have three computers that were purchased with Win 7 home premium. All three have been upgraded to Win7 Pro. The two running win7-32 Pro I can RDP into no problem. The one running Win 7-64 pro I can't. The one Win-7-64 PC also has a monitor running an HDMI connection to a 1080p HDTV and has an ATI Mobility Radeon HD4330 display adapter. I can use logmein no problem on this machine. I should also add that prior to upgrading to Win7-64 Pro, i attempted to install the RDP service service via this link which didn't work either. Although the installation of that hack acted like it would work because at the end of the install it tests that the correct ports are listening.
I checked the version of the termsrv.dll file and it seems to be ok (termsrv.dll version=6.1.7600.16385)