My Xbox 360 won't read CDs. It says Open Tray when I put one in. It reads DVDs and Games just not CDs.

IMO Never Use a cleaning disc for Gaming consoles. Which Xbox 360 do you have? Is it the Older Model or newer one? You can Try Blowing into Your Xbox disc drive. Is your xbox up to date,you can unplug your xbox 360 and from the wall and the Xbox. Wait 25 Mins and Try again.

Try to insert a straighten paper pin into the hole under the tray if still no go You have to open the cover and take the cd out.

Open Tray Error can be caused by a couple of things.
Here are the most likely culprits:

Process 1: Clean Tray Drive Belt
Difficulty Level : EASY
Allow tray to open, then unplug with tray still open.
Flip Xbox over.
Removing front cover helps with access: If you look carefully, you can see the drive belt (small black belt). Use cotton swabs dipped in alcohol to carefully clean all dust and debris from the belt. You can (CAREFULLY) move the tray back and forth to ensure all of the belt is cleaned.
Once done, plug it back in and allow to reboot completely.
Once rebooted, open tray and insert disk to see if error is solved.

If not, then proceed to the next process:

Process 2: Adjust Laser Power Level
Difficulty Level: Expert
I have done this on my and my daughters 360's. You'll need specialized tools to open the case. If you don't have them, please don't butcher your Xbox360 using screwdrivers and such. Order what you need and do it right. The process is too detailed to describe here, so check these links instead.

I hope this helps

Adjust Laser Here: Xbox 360 DVD laser adjustment
or
How to Adjust the Laser on XBox

my x box 360 Kinect want work because when I put the game in it said open and close the tray

It seems your laser isn't reading the second layer on the games. Regular DVDs have only one layer of information, Xbox 360 games are "Dual Layered" meaning twice as much information in the same area. I would recommend buying a replacement laser from eBay and installing it yourself (as you already know how to take the Xbox apart)

Question mdn5024 do you hear the drive try to read the disk and give out in 1-2 spins?

You need to go to best buy, or radioshack and buy a dvd LENS cleaner, This is a common problem.

this is a problem the microsoft has been working on ... remove any disc from the tray> unplug it from all power the plug it back in> open the disc tray .. leave it open for a little while like 10-15 seconds .. then put the game in and it should work .. if it does not however you have one of the defected disc trays and you'll need to get it repaired by microsoft .. i know its not what you want to hear but hey at least they will fix it free of charge =]

Your laser is bad in the drive. When it comes to reading games, DVd's, music cds, it requires a different strength from the laser in your dvd rom in order to read them. If it can't read all types then the laser is definitely bad and you can either replace just the laser or the whole drive.

new dvd player