Foul Ball Call - Does it make the ball dead ???

[cmckenna]

Had a sitch last night that I want to be sure about. This was a LL Majors game.....

Batter swings and foul tips the ball directly in to the catchers glove who makes a clean catch. I did not see the catcher catch the ball and thought it got by him (my bad) so I call FOUL BALL!!

There was a runner on first who got about half way to second and stopped when he heard me call the foul ball and did not hurry back to first. Catcher throws to first and F3 tags him.

The question is:
Was this still a legal play or does my calling foul ball make the ball dead? After discussion with both coaches we decided not to award the out but I still feel pretty bad because I feel that it was my fault for yelling foul ball and making the runner stop.

Thanks