HELP!!! tomtom 6 for palm treo 650

[oakman]

I have a palm treo 650. I just downloaded tomtom 6 and U.S. maps online. I installed tomtom 6 on my phone. (im pretty sure I did it right). I have the navigator symbol and everytime I click it, it says, "tomtom sd card not found".
Well I put a bunch of crap on my sd card and tried it again. I clicked to open the navigator but this time, instead of it saying "tomtom sd card not found", the phone completely shut off on me, then restarted.

I dont know what i am doing.
can someone help me? thanks!
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