Mic Problems

The mic used to work well, headphones still work. It's been about 2
years since last time using it. I checked the volumne control to see if mute
is checked, (it wasn't). I still get the same response from Net Meet. Mic not
found. I even went out and brought a new mic last week. Still nothing.
I have a HP7905 Pavilion. OPS is XP Home. System is about 4 years old.
Any help would be greatly appreciated.
--
Lisa
All the Worlds a Stage