Psion GPS experts, please?
 

I have coupled up a Psion 5 MX and the original TomTom Pal Top Navigator GPS. It starts an initiation sequence and locks on to from 3 to 5 or 6 satellites. After about 20 seconds of operation it stops operating and gives the message " Program closed. Code User, reference 23" Now, unsurprisingly, that is as helpful as mammaries on a bull. Does anyone have any idea WTHIH??
TIA