When i try to start mozilla , I see the browser window and buttons just for a second and then the window is closed .
I've tried to uninstall mozilla through Red Hat's Package Manager en re-installed Mozilla , but when starting Mozilla it still closes the window immediately .
Whats wrong , does any one have a clue ?

A shell may have a clue. Try running mozilla from a shell and see if it spits out any errors.

i typed /usr/bin/mozila -debug
and it came with the following :

Gdk-ERROR** : BadWindow (invalidwindowparameter)
serial 1744 error_code 3 request_code 2 minor_code 0

Does this tell you anything ?

It happens to me when I sent an e-mail. Yes the e-mail gets to the sender just fine. I can run Mozilla Mail client but not Mozilla Navigator. When I sent an e-mail earlier this week, Mozilla Navigator didn't want to run. I thought go into Mozilla Mail and try to run Navigator. Then Navigator worked. I closed Mozilla Mail and then Navigator. Next I opened up Mozilla Navigator without Mozilla Mail. It worked. It must be Mozilla Mail that has a bug unloading gdk libraries.

Another way to correct this is to delete the hidden directory. Mozilla should recreate the hidden directory. Though you will lose your bookmarks and mail.

I deleted the hidden directory and started the browser throug mozilla mail but that didn't work :-(