this mission was make by DYOMIX not normal DYOM so if you want to play you must use DYOMIX or go to youtube watch:
how to make DYOMIX mission run on normal DYOM

story:it adout time for your first real mission Tim thair commander and ton of enemy are moving on one bridge so what's the matter?
this one not just normal convoy this one have lot of supply on and enemy commander of the right side if we kill commander thay will go back to los santos for sure and that's the time we going to landing to the enemy zone so what you waiting for go kill thair commander already!