NIS can't find my IM programs

WinXP SP3, NIS 2009

In my internet settings, instant messaging protection is switched on.  However when I click Configure, all of the IM programs in the list are grayed out.  If I click on "Check for nwe IM programs" it says "No IM programs were found."  I have Yahoo 8.1.0.421 and Skype 4.0.0.169. Yahoo is in the list(grayed out), but not Skype.

Am I protected?

Why can't I select any from the list?

Why can't it find the programs I have installed?

Thanks,

Rusty