Stopping a swf reload

I’ve been struggling with a solution to this problem and it seems as though it should be relatively simple. I’ve got three movie clips in my main swf, which use to load other swf’s between them. I call them ldr_1, ldr_2 & ldr_3. If ldr_1 contains a button that will load a swf into ldr_2, I’d like it to not reload every time the button is released. I’ve tried several variations, but stuck on this code (it is coded on the button):

if(_root.ldr_2!=cntnt_1.swf,true) {
loadMovie(“cntnt_1.swf”, “_root.ldr_2”);

Can someone tell me what I have wrong?