I have just purchased a DVD-RW and having never installed anything on my PC before am having problems installing it! It came with no guidelines or paperwork! In the shop I was advised to set the DVD-RW to the third setting on right (?slave I think) and to adjust my CD-RW to the middle setting (?master). All nice and easy I thought! Managed to do this and to connect the cables no problem. However, when I then put my PC back on I get message saying cant find master or slave! it then asks me to insert Boot disk - any ideas what I have done wrong?