I purchased an MC28 lock set (fuel tank cap,helmet lock, glove box door lock). The key worked fine in all but when I tried the tank cap in hand, the 2 latch bars at the bottom retracted but now they are stuck in this position and I can't remove the key. I sprayed the lock with penetrating spray lube just in case something is sticking in the lock tumbler but no luck removing the key. Am I missing something? Is it possible to remove the lock from the cap and if so how is it released? Appreciate any help anyone can offer.

Thanks
Andy M.