Apps installed could not be determined

My iPhone is running on iOS 6.1.2 and it is jailbroken. About 10 days ago, I ran a script and deleted some files to fix the weather app problem. After that, every time I try to sync with iTunes, I get the error: "Apps installed on the iPhone could not be determined.". I've restarted everything and deleted everything on my iPhone. I've even restored to an old backup. Is there any solution? I can't even sync my music!
As you know, Apple doesn't sign 6.1.2 so I can't restore.

P.S:
the deleted files on iPhone are "com.apple.mobile.installation.plist" and "com.apple.LaunchServices-045.csstore".
and here is the script that pod2g has said:

chmod -x /usr/libexec/mobile_installation_*****
killall -9 mobile_installation_*****
rm /var/mobile/Library/Caches/com.apple.mobile.installation.plist /var/mobile/Library/Caches/com.apple.LaunchServices-045.csstore
launchctl stop com.apple.mobile.installd
launchctl start com.apple.mobile.installd
while [ ! -f /var/mobile/Library/Caches/com.apple.mobile.installation.plist ];
do
sleep 1
done
while [ ! -f /var/mobile/Library/Caches/com.apple.LaunchServices-045.csstore ];
do
sleep 1
done
sleep 10
chmod +x /usr/libexec/mobile_installation_*****
sync