DOTM Deluxe Optimus Prime

Hi guys,
I recently bought DOTM deluxe prime for my son and for some reason he has some major problems.
none of the youtube reviews that i saw mentioned these problems.
The first problem is his chest won't stay tabbed when i close it.
i thought the head was in the way but it doesn't seem to interfere.
secondly during his transformation to robot mode when i pull the two shoulder pieces apart the head won't spring out, not until i turn the back lever up.
and lastly his weapon won't stay in his hand.
i was just wandering if you guys have any suggestions.
cheers.
I recently bought DOTM deluxe prime for my son and for some reason he has some major problems.
none of the youtube reviews that i saw mentioned these problems.
The first problem is his chest won't stay tabbed when i close it.
i thought the head was in the way but it doesn't seem to interfere.
secondly during his transformation to robot mode when i pull the two shoulder pieces apart the head won't spring out, not until i turn the back lever up.
and lastly his weapon won't stay in his hand.
i was just wandering if you guys have any suggestions.
cheers.