DVR 111 Slowwww to load iTunes etc

I’ve just installed a Pioneer DVR 111 and it takes ages to recognise the media I put in ie if I put in an audio cd it takes ages to recognise it as audio and start iTunes. It’s the same for pre-recorded DVDs and blank media (where XP offers you the choice of viwing the contents with Explorer).
Other than that the PVR 111 works fine and is very quiet. Any ideas?