HOW CAN I CONTROL DUAL-MONITORS UNDER WIN 7 ?

[lynxcat]

I have 2 monitors, but I can't see extended desktop when connected via uvnc. and my remote OS is win7 Pro

it was ok under XP before, but our office updated OS to win7 recently...and this really troubles me...

thanks everyone for help

[lynxcat]

now i've installed VHD, but the secondary screen is in gray...