trasher_can

I have a PS3 that can see the Media Centre PC online from it but says it doesnt have the correct credentials to access the data. When I have looked online all I can find is information relating to adding MC Extenders (and I presume, maybe wrongly that this is just that). BUT, I cannot find the settings in this version of Media Centre that allow me to add extenders or allow external devices to access the library that I can see on the PC. Any ideas anyone ?