Photos are not showing up in camera roll

Hi!

I changed my cracked screen today on my jb'd iphone 4s @ 6.1
When I started it and looked into my camera roll, no photos or videos showed up.
Checked storage, it said I should've 39,8gb of photos and videos.(Which I should've)
I went into ifile "private/var/mobile/Media/DCIM" And there it was, all my photos and videos.. in 4 directories; 100APPLE, 101APPLE and so on.
Does anyone know how I can make them show up in my camera roll?

Thanks in advance! :)