Location of packages

[Ehud Kaplan]

I am trying to Lyx a file, but I am getting the error:
*Latex error: File 'xcolor.sty' not found.*

I have placed the xcolor.sty file in a folder  a folder called xcolor in 
/usr/share/texmf-texlive/tex/latex/xcolor

I ran texconfigure and texhash.

I am running Kubuntu 8.04 with tex-live

How do I make it known to Lyx and Latex that the file is actually where 
it is supposed to be?

Thanks,

E. Kaplan