iTunes wont recognize my iPad and it won't recharge unless powered off

Based on your description of the issue, I think the first step would be to swap out cables. Are you charging from the wall adapter?

What model iPad and what version of iTunes are you using?

iPad not appearing in iTunes

http://www.apple.com/support/ipad/assistant/itunes/

iOS: Device not recognized in iTunes for Mac OS X

http://support.apple.com/kb/TS1591

iOS: Device not recognized in iTunes for Windows

http://support.apple.com/kb/TS1538

IOS: Syncing with iTunes

http://support.apple.com/kb/HT1386

Apple - Support - iPad - Syncing

http://www.apple.com/support/ipad/syncing/

 Cheers, Tom 😉