Need for Speed Racing Games

hi everyone....

i have just come back to playing undercover after 6 weeks and have found that i am missing my cars and tier unlocks. i am still at my current race from when i left though, but with my first car. i should be driving my lancer.
no i dont use any cheats or cracks.
any idea as to what is wrong? how do i get my cars and unlocks back without having to start over again?
i have been playing need for speed since the 3do and this is the first problem i have encountered.

current NFS games installed - underground2, most wanted, carbon, undercover. undercover is the only one affected.
i use the same profile name for all of them.

specs:
win7x64 ultimate
gigabyte ga945gcm-s2l
intel e8400 core duo
nvidia 9800gt 1gb ram
4gb gskill ram
wd 1tb hdd