I find the changes happen quickest when you ftp your files through dreamweaver to your site (maybe you aren't updating your pages as you change them?) Then refresh the page in your browser after you have done this.
By the way, your web browser isn't in dreamweaver, it's a browser you specify in dreamweaver which the program then exports to view to.
Worse comes to worse and you may have to quit explorer and then restart the program.