Dreamweaver Spry Drop Down Menus

I know there have been a lot of posts about this issue, but I am wondering if someone can help me with my drop down menus in Dreamweaver. I'm using their Spry feature, but am not getting consistent results on all browsers. I'm on a Mac, and my drops downs appear perfectly on both Firefox and Safari. Viewing them on a PC, however, seems to be generating mixed results. My vertical menus sometimes work fine, sometimes show up horizontal, and in one case did both (depending on where the cursor was pointed). Can someone help and what URLs do you need from me to check a sample page? - Jen