bullet spawn point is not staying in the right place

hey, i got a spawn point for were i want a tank to spawn the projectiles, this spawn point is an empty object attached to a box wigh is supposed to be the tanks turret. the problem is when i move this cude the spawn point moves away from its position relative to the turret. there is no code involved, i just parented them and changing the form of the object doesent seem to work ether.

If some one has anny idea on how could i solve this pleas let me know. thanks to all