Two separate LocalConnections?

//I’ve got this working

var sending_lc:LocalConnection = new LocalConnection();

this.mcLeftBox.onRollOver = function() {
sending_lc.send(“lc_name”,“methodToExecute”);
};

//but when I do this, this part doesn’t work
this.mcLeftBox.onRollOut = function() {
sending_lc.send(“sendingBannerStart”,“methodBannerStart”);

};

Do I have to open a separate LocalConnection for each different command I want to send to the same swf?

If not, why won’t this work?