Mike,

i really wouldnt worry about your situation too much,2 months in terms of young anacondas refusing food is quite common.Young greens especially wc ones can be a problem to get started feeding ive had some that took up to 6 months to take their first meal.Anacondas have very slow metabolisms so this large gap without eating does not seem to be a problem.Kelly is right in suggesting birds,chicks normally do the trick but in really stubborn cases dead/ live small finches seem to do the trick.
Also try feeding in the dark or overnight this canoften do the trick with shy feeders.

Dan