CSS Menu not displaying correctly in IE

Okay i have designed a CSS menu with help from [login to view URL] for the structure and css coding. When i view the site locally on my computer, it displays correctly in both Firefox and IE. When i upload it to my store in the left column, it displays and functions correctly in Firefox, but looks messed up in IE. My guess is its a conflict of the menu css and perhaps the store front css file OR its a margin issue where it is used to counting pixels from the screen border rather than starting from in the middle of the page. Make sense? i dunno. Anyways it seems like a fairly easy fix, but its frustrated me for too long now and i just cant think straight.