I have the same problem:
Upgrading to 1.60c.00WWE
and i have installed activesync 4.1 (last release from microsoft)...
activesync said he try to connect to my qtek 2020 (worked good before rom upgrade with activesync 3.8).
I also try to start from a good windows XP (and clean) version: i format my pc and reinstalled windows xp on it (sp2) + activesync:
same result (device detected but no sync)
on my qtek activesync (in the bottom on screen) said he is connected but not on my pc...
Any idea will help me good, thx a lot !
HTC HD2 with TT7
Rom: 1.66.406.1 (76641) FRE - Radio: 2.06.51.07