3 1/2 year old guide dog quit hunting

[beaglebob1]

I have a 3 1/2 year old EP that was a guide dog in Kansas for 2 years that seen tons of birds hit the ground. I got him june 2009 and never got much time to get him out.We hunted him twice last year and he pissed me off so much I put him in the truck. I have 6 pointers and did not give him the time a field after those two times.
Worked him some this summer and fall and he just quit pointing birds. He is forced broke to fetch and will do that.
Took him out to a preserve 3 times so far with plenty of birds and he has yet to point a bird and goes back to the truck.
I got him from Shawn at Shady Meadows and he swears the dog is a well seasoned dog that came from one of his trainers.
So what could be some of the reasons that have caused this dog to not want to point birds or hunt for them?