External dvd writer wont work

i have a dell dimention 5150c,it has a samsung TSL 532 slimline(lap top style) dvd combi writer. when i open my pc and look on the back of it there are no jumper settings. my problem is i have bought a pioneer 110 dvd combi drive fitted in a sum-vision external enclosure. when i connect to pc with usb2 win xp detects the usb hardware,but i cannot locate the drive in “my computer”.i canhear the new drive reading the disk but nothing gets through to my pc. i have tried the pioneer with all 3 jumper settings still nothing… please help me

Please, don’t start new thread with the same topic that has been answered a few posts up (or down when you read this).

I’m sure in time other members will assist you there.