Hi tommygunner,
I need a link to your site otherwise I can’t do much. There are many reasons that sites don’t appear correctly in IE7, but I can’t know which problem you are having without seeing the code.
If you having z-index difficulties, then you need to apply the z-index to the second level list item by manually editing the CSS code. Something like #suckerfishnav li li {z-index:1000} would do the trick I think (I haven’t tried though).