Help with Short shifter

[zoomspeed24]

So i put a B&m short shifter into my Msp today and i don't have a 4th gear anymore... So i took it a part and put it back together and still i have no 4 gear any ideas?????

 

[silverspeed03]

Take it to a shop.

 

[computerGeek]

sure it isn't in backwards

 

[zoomspeed24]

yeah i got it .. The retaining ring was all messed up