The roller table looks to be out of position, the roller jewel is normally at 90 degrees to the arms. Add to that the hairspring is likely not correctly positioned I agree that you are way out of beat.
The simpler explanation is that you're installing with the impulse pin outside of the horns. Depending on the mov't you can actually see if that is the case.
When it happens like that, leave the cock screw lose, and lift the balance so slightly that it can fell within the horns. Assuming there is at least some power it will start beating right away.
Just a passing note, it is said impulse jewel that makes the pallet move, not vice-versa.