So please give me the solution as soon as possible.
Use FireBug plugin for FireFox to see what RF CSS classes override your own.
Note that you must put your stylesheet into h:body, not h:head.
We are not going to give you the fish, just the fishing rod.
Thanks for suggesting me the tools.
my all css related problems are almost solved.
I am happy with the fishing rod and i will be more happy to catch my own fish.
but your help is really very valuable.