I was given an NEC ND 2500a to replcae my CD-RW/DVD - ran the fimware. Plays the dvd haven’t tried the burning yet. I had set-up a wireless system and needed to reinstall the software for the router when I place the install disc in it just makes the noise of reading but nothing happens. Checked the settings all looks good. Can’t figure out what is wrong. I have Windows Vista as the OS,. Anyone have this problem?