How can i fix the headphone socket on my zen micro?

Hi, i brought my creative zen in Januaray 2004.
But For the last 2 weeks my Creative zen micro's headphone socket hasnt been working properly..i have to fiddle with it to get any noise out of it. I dont know what the problem is with it, ive tried new headphones but the outcome is the same..It really is annoying me!!!! does the warranty cover it? and where can i get it repaired from?..and lastly..can i repair it myself..?
any ideas?
Regards..
B