Depending on what year model your Jeep is it may have electric power steering, there was a thread about this on iRV2. If you have the electric power steering you need to have the key in the accessory position to allow the Jeep to tow properly, this will drain the battery so you need to add a charging wire to the Jeep.
If your Jeep has hydraulic steering do you have a steering wheel lock, if so it needs to be unlocked for it to tow properly. If this is the case have a dummy key made that doesn't have a chip, allows the steering to be unlocked but the Jeep won't start.
If none of these conditions apply I would suggest you add a trac bar and make sure your tow bar is level. Hope this helps.
__________________
|