Help needed with kernel !! please

[EAD]

I have a big problem, I have installd kernel 2.6.14 and I thought Its a good one, and it isn't stable
So I wanted to go back to 2.6.13 after I have removed it.
So I went to sympentic and add it and removed 2.6.14, the problem now is:
My nvidia driver isn't set up right and I can start the X-window, even thought I have enable the Nvidia install at the boot, it says that my nvidia is allready installd, and it isn't on this new fresh kernel, and so is alsa driver.
What can I do to get my KDE back ?
and BTW How can I make sure that this time the openGL works and installd good?

[Cabhan]

Allow me to understand:

You upgraded to 2.6.14, didn't like it, and so returned to 2.6.13. Now, your nVidia driver will not work.

The nVidia driver is a kernel module, and so will need to be re-installed whenever you change your kernel. Remove the driver and reinstall it under the 2.6.13 kernel. That should work.

As far as openGL, the command "glxgears" will test openGL and give you some FPS information.