The only time the search button changes colour is immediately you press it and only for a very small moment.

Are you getting any search results?

If not, check that you are connected, the button in the bottom left hand corner should be green.

if it's red, go to File>Connect.

Sometimes you can get diconnected without realising.

Hope this helps a little

__________________
~Kath~
Always judge a person by the way they treat someone who can be of no possible use to them