Broken Dominatior DDR2 memory - lifetime warranty?

God morning!

One of my memory sticks has brokenl. It's 2,5 years old and has been working flawless until ~2 weeks ago.

The other stick is still working so atleast my computer is up and runing.

Full name of the sticks:

Corsair 2X2GB DDR2 1066MHZ KIT CL5 DHX
TWIN2X4096-8500C5DF

How do i proceed? or i is it a dead couse?

Kind regards
Niklas