What you are forgetting is timeline. The events of The Incredible Hulk even the scene in question takes place after Iron Man 2 when Stark has already stopped creating weaponry. They are old of course they didn't work.
The Incredible Hulk almost to the point of being annoying made it seem like everything and anything the military was using was StarkTech. Now that was before Iron Man 2. Thanks to Iron Man 2 that would be illogical, because at the end of Iron Man 1 he stopped making weapons and the contracts were issued to Justin Hammer. Hammer Industries had them until the events in Monaco which means anything used at the Culver University incident would either be really old tech or should be in reality HammerTech.