Error #1063: Argument count mismatch

Hello everyone

I have some supposedly simple code to control a component on the main timeline from a button within a movieclip on the timeline, which is resulting in: “Error #1063: Argument count mismatch on net.slideshowpro.slideshowpro::SlideShowPro/loadAlbum(). Expected 2, got 1.
at csp_main_fla::nav_bmc_1/loadAlbumWildlife()”

I have no idea what the problem is and it’s holding me up! Very frustrating! Here is the code on the movieclip’s timeline…

stop();

wildlife_btn.buttonMode = true;

function loadAlbumWildlife(event:Event):void { MovieClip(this.parent).csp_slideshow.loadAlbum(“wildlife”); }

wildlife_btn.addEventListener(“click”,loadAlbumWildlife);

Any help greatly appreciated!

Thanks