Vista/XP Dual Boot - Bootmgr is missing


i had vista/xp dual booting just fine. Turned off the computer and the next day I received the bootmgr is missing screen. So I followed the documentation and did a repair off the vista dvd. Vista now works fine. The boot manager screen was now no longer shown. The manage operating system screen didn't show xp. SO I added it. It now shows Windows Xp and Vista. When I select XP it just restarts the computer. Any ideas?
Are you sure the settings for XP are correct? Is it set to /BOOT or C:\ in the EasyBCD settings? If it is set to the Boot drive try setting it to C:\ or D:\ depeding on your setup.