Windows Media Player

Needing some advice on a problem I'm having with Windows Media Player.

When I view a list of my tracks in "my libary", windows shows most of the tracks in grey, but there is a few listed in white. I can only see what track's under the white by clicking on it.

How do I get all the tracks to show as grey, like they have always done?

Is there any reason for tracks to show in white?

Thanks

Quick google brings up this

http://www.microsoft.com/windows/windowsmedia/knowledgecenter/mediaadvice/0085.mspx#EDAAC

Does this solve your problem ?

Thanks ever so much!

Finally got this sorted after many annoying months.

Cheers