mic headphones problem

[Jon Grant]

I've got a very bizarre situation. Two pairs of headphones which work
perfectly in another PC do not work with my Dell Laptop Inspiron 1300
mic jack port. but bizarrely if i plug headphones into my laptop jack
I can speak into the headphone and be heard on voice chat etc..!

so anyone know the real Mic not work with the port..? Maybe some
stereo configuration? although mic has stereo jack...

Any tips appreciated.

Kind regards, Jon