Default Camera app disappearing each reboot?

Okay guys so earlier today I tried to take a picture with my razr i but the camera button wasnīt working so I decided to enter from the launcher. I couldnīt find the camera icon (Im using a custom launcher but it is not in the hidden apps). Used pixlr express to take the picture and it reads "No camera application found. Your camera may be disabled". I checked and the camera is NOT disabled.

I had been using this for a few months without any problems so I had a backup from MotCamera.apk and MotCamera.odex and if I move them to /system/app I can use it, but when I reboot it dissapears again!

any help would be appreciated thanks in advance (: