Menu Showing Delay in Win2k/IE6

Whenever I right click in Internet Explorer 6 (running Win2k Pro), it takes a long time for the menu to appear. I have looked for any MenuShowDelay in the registry and set the values to zero. This only affects the start menu and pulldowns, not theright-click menu in IE. This is frustrating when you’re trying to save a bunch of files, it slows everything down. Can anybody help? Thanks,