Shoulder pain please help

[AsrarHussain]

Hello friends i am new to this forum.

I  want to ask I am getting shoulder pain the reason being I have over developed front deltoids and iv been told to do more rear deltoids. 

I have trouble retracting my right shoulder blade I can get a mind connection retracting the left shoulder blade but the right shoulder gives me the most nuisance 

 

I train as a bodybuilder not a gymnist but as bodybuilders are not Fit like the Gymnist sorry for spelling i have a language impairment.