Always on the forum as usual

I've bought these USB HP headset. Strangely enough; they are perfectly detect , I can hear through them, but the mic doesn't seem to work. I tried the sound recorder, Skype and recordmydesktop; none can record the voice through them.
Where I bought them they assured me that they worked well in Ubuntu.
Any suggestion?
Update: I tried them on Mandriva and Fedora. They work perfectly. In Mandriva, though, the module used to configure them is kbd while in Mageia is snd_usb_audio or somethinf like that!!
How can I change that?
Thanks ahead.