Delay on MouseOver

Sorry, I am new and I don´t have any expirience with your product. When I take the code of your example "dialog.htm" an put it in my application there is a very strong delay of showing the mouseover-effects of tabs and buttons. This delay only occurs in IE 6, but not in Firefox! How can I manage this?

Well, as I found in this forum something about the cache, i deleted my "Temporary Internetfiles" of the IE and: There is no delay anymore!!!!!!!

It works perfect :-)