Laptop microphone not functioning in Windows XP

[CheerUpEmoKid]

hey guys -

i cant seem to get my microphone working on my lifebook a6110 in windows xp. when i go into my master volume controls, i cant select advanced controls, nor can i select the recording radio button inside the properties menu.

anything i seem to try, doesnt seem to get my microphone working. do you have any ideas for what i can try? thanks