Combobox loads variable in URL?

[baument]

I need to load a variable from a Combobox into the tail end of a URL...ie:

(script is on same layer as combobox)

on (change) {
loadMovie("http://somewebsite.com/flash/636050/" + myComboBox.selectedItem.data, "1");
}

The data set loaded into the combobox is the filename....ie:

black.swf

I load external swf's into the various levels of this app.

Can't get it to work. Am I connecting the variable to the URL in the wrong way?

I've also tryed putting the entire path/movie name url in the dataset but it doesn't work either.......

Any thoughts?