Firstly you apparently haven't connected the motor supply to the L293D! The two power
strips on each side of the breadboard aren't linked. (Also you may need to check that
they don't have a break in the middle, many do).
Secondly what is the motor power supply (not 2 AA batteries as in the picture I hope).
There are plenty of example circuits using the L293D dotted around these forums and
the internet to compare against.
[ also I've just noticed you haven't connected either enable input - I think
that's necessary (they certainly need to be HIGH for any output current) ]