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5V battery pack(4 AA batteries + 5V voltage regulator)
Your issue is the power supply. Remove the radio shack 5V regulator, and plug your batteries directly into BAT of the Axon.The Axon won't work properly unless you power it with at least 5.3V at BAT.As for your LCD display, read this post in it's full entirety:http://www.societyofrobots.com/robotforum/index.php?topic=12221.0