making the sony peg-n760 work with a memory stick pro

i was given a sony peg-n760c. it didn't have the memory stick with it but i already had a 512mb memory stick pro. everytime i put it in the pda says 'no memory stick not detected'.

is there a way of making the memory stick pro act like a memory stick? someone suggested formatting it in fat16 which i tried in xp but with no luck. can someone help me?

is there a program or something?

Thank you

Chris