Where is the warning.

[kel93tex93]

I coach a peewee football team in CO. We were playing 7-8-9 yr olds. Thus team had a very short player that was running the ball when my player went for the runner he was reaching over a blocker when he grabed the shoulder pads and pulled him down. The referee didnt throw the flag until the other caoch said something. Now we have one coach on the field on both teams. I was on the other sideline and i was saying the boy was short, and referee threw the flag at me and ejected me with out a warning. the line judge said that was wrong and didnt fight it. So is this right