ActionScript 1/2 :: Var Not Being Picked Up In URL?

I'm trying to load an external SWF into an MC. The SWF is determined by a variable in the main MC. The first frame of my main MC contains a preloader, in the second I have added the following line of actionscript code decalaring the variable;var dealershipName = "bellville";From the main menu a seporate MC is loaded onto level 1, from within this MC depending on the var declared in my main MC the external SWF is loaded into an MC called staff. The actionscript code used for this is as follows;loadMovie("http://www.baronsbellville.starterweb.co.za/staff/"+_root.dealershipName+"/nvss.swf", this.staff);To the best of my limited knowledge at runtime the "+_root.dealershipName+" should be replaced with bellville and the file should load. This is not the case though. If I replace the "+_root.dealershipName+" with bellville in the above url it works fine.