Delphi RS Client help

ok so i'm working on my own RS Client in Delphi, and i'm using TWebBrowser, and it works fine, and i load it up, go into rs, and that works fine but as soon as i try to leave (quit program or change page) from the game page, my whole comp crashes, I'm guessing it has to do with the java, it'll load fine and i can play, its just as soon as i leave it the comp. goes...

any help would be greatly appreciated