Hey scooter, both of these gents are giving you the right info, check the tube for obstructions first and then
use a single clean wire from a grill brush to gently clean the brass orifice of the gas jet.
If that still doesn't seem to rectify the situation, replace the propane can with a full one and try lighting it again.
The Touch-n-Go starting system really is pretty bullet proof as there just aren't many parts to go bad.