Color Problems

Please can anybody help me....
I am trying to change the color of the active links and the color of the text
I go in ..styles>>colors >>>I am changing the code I click send,save
and nothing.......
nothing is changed?
Why????

It could be a problem with your cookies or temporarily internet files. You should also try with another internet browser.

THANK YOU VERY MUCH FOR THE ADVICES
I have tried with different browser but no...
Can it be because of the theme???
But I doubt because when I am changing it on the right side where there is a window for preview on the forum the color is changing, but after I click send there is nothing, it's the same as it was before.

So is there something else that could be the problem???