My Apple Iphone isn't working with itunes?

So i have an iphone 3 and it connects to itunes. But when i try to put music/apps on it it doesnt work?

Iphone 3 isnt sompatable with itunes anymore because its too old

Your iTunes may be not compatible with your iPhone 3. If you want to sync the video/audio file from iTunes to your iPhone, you have to use a DRM remove tool to convert DRM protected files to unprotected contains. NoteBurner M4p Audio converter is just a useful program that help you convert the M4P files from iTunes to common audio files like MP3.