[MiKTeX] packages not installing

[Antonio F. <af...@gm...>]

Hi,

I just installed MiKTeX 2.8 on my WinXP Pro SP3 computer and am trying
to install some packages that are not on CTAN. I am placing the .sty
file in the '.../MiKTeX 2.8/tex/latex/' folder and then refreshing
FNDB and updating formats, but the package doesn't show up in the
Package Manager. CTAN packages install with no problems.

I've tried doing a clean install of MiKTeX but it didn't help.

Any idea what could be going wrong, and how to fix it?

Cheers,
Antonio