Spry MenuBarHorizontal

Hi,

I am a new user and I am trying to add a spry MenuBarHorizontal. I have it on the page OK but the sub-menu is so small I can't see it. It worked OK at first and then I did something and it changed the sub-menu size. I tried cutting it and doing a new one but the old comes back. If knowbody has an answer does anybody know how I can set it back to defult???

Thank you for any help.
Andrea