CD drive doesn't work. Can someone help?

I have the Dell 4550 series desktop.  Purchased it 4 years ago. 

My first problem is with the cd drive door.  I press the button and 9 out of 10 times, it doesn't open.  I could press it several times and it still wont open.   If and when it does decide to open, I insert a music CD, whether it is a burned cd or a cd I've purchased.  When the door closes and the drive activates, my Music Match Juke Box comes on to my screen.  Ok, good so far.  When the track list appears on the Music Match Juke Box, it shows the list of songs on the CD.  Here's the problem --- Music Match highlights the first song that is to be played, but instead of playing properly, it quickly runs down the list of songs all the way to the end of the list, sort of skipping on down without actually playing the song.  At first, I thought it was a problem with the specific CD, but I've it tried with all of my CD's and it does this with all of them.  I can play my CD's in my car, so I know it's not a problem with the CD's themselves.    I 've tried to go to the control panel, clicked on "system" icon, clicked the hardware tab, clicked "device manager," clicked the + next to DVD/CD Rom Drives, clicked the type of CD Rom I have (which is Samsung), click "properties"  and it says "this device is working properly.  No it isn't.  I've tried to update the driver by going to the wizard, but then a box pops up on the screen that says "Cannot Continue Update Wizard."  I have no idea what the problem could be.   There is never any type of error message when I try to play a CD...nothing.  It just skips down the list and I don't know what the problem is with the door not opening.  Sometimes, it opens, sometimes it doesn't.  If anyone has had the same problem or knows what it could be, I'd appreciate some help.  Thanks

J