Two things that don't really solve your problem, but will definately help anyway...
First, edit your post and put the code and xml between the CODE brackets. It will make your post much easier to read.
Second, why are you overriding the service method? You should be overriding the doGet() or doPost() or do***() methods in the servlet instead.
“Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.” - Rich Cook