Powerbook G3 M4753 Wallstreet CD-ROM Type ?

Hi there,

Can anybody tell me the correct CD-ROM type for a Powerbook G3 M4753 Wallstreet ?

I purchased a drive on eBay (an M2451) and any CD I put in it tells me the drive unreadable and should be initialized.

Is this a faulty drive or did I purchase the wrong type ?

Thanks.