2005 Jeep Laredo 2005 Jeep Grand Cherokee some times won't

My jeep sometimes won't start. I replaced the module that programs your keys. I believe they called it Wireless Control Module. When my jeep won't start I have to disconnect the Battery cables and hold them together for 10 seconds then I reconnect them and my jeep starts. I have been told this resets the computer. That makes me think it's not the starter. This doesn't happen all the time. Although resetting the computer (doing the battery cable trick always causes it to start).