I just recently bought a 2002 rubicon and am having some problems with the transmission i think but not sure. Here is my problem.

When i crank the bike up it will shift into drive 1 & 2 and i can get up to 3rd gear in esp until it starts flashing but will not move, I did the code test and i think it is saying code 11 it flashes 5 times the 5 more times then 1 time. Hopefully someone can help me with this problem.