windows 7 beta not detecting diamond

[ervman1]

Hey guys, i installed windows 7 beta on my computer but the windows mobile device center no longer opens so i cannot sync and backup my contacts or flash!! ive tried reinstalling wmdc as i read on another website but even that didnt work. windows 7 beta works wonderfully other than this problem. its really frustrating. windows 7 is supposed to have device stage but its not implemented in the beta yet. has anyone else had any success with connecting their diamond and syncing with windows 7? i appreciate any help. thanks, ervman1