I have just bought a Sony Cybershot DSC-P9 fairly cheap and it does not recognise the memory stick (4 Gig Memory Stick Pro Duo) even though I am using the recommended adapter.

Any ideas (apart from binning it)?

My computer recognises the memory. Is there any way of making it work by creating the appropriate folders onto the memory stick or do I need to buy some older memory to suit this model?

(This is just for carrying around as a second camera)

Any feedback would be appreciated.