I rooted my phone so I could uninstall the stock (pre-installed) apps. I accidently uninstalled the Calendar app. I have the Android 2.3.4 apk file. I used root explorer to move calendar.apk to the system/app/ folder, but when I try to find the file, it doesn't show up next to calendar.odex.
Also, there is something wrong with my contacts app. Whenever I try to open it, a message appears at the bottom of my screen saying AAB Initializing. The contacts.apk file does show up in my system/app/folder. By the way, for both apps, when i try to install them it fails.

Does anyone have the backup files for Root Uninstaller, or know how to fix this?