Tom Tom Navigator 5 and Palm T3 problem

I have just bought Tom Tom Navigator 5 and BT GPS. When I put the SD card in my Palm it goes through some of the initial setup and then stops with No Maps found. But when I put the SD card in my Ipaq it asks if I wish to activate the maps? Is this a common problem why will the programme not find the maps on my Palm T3 as this is what I bought it for.

Thanks in advance

Simon