Problem with fall out menus in IE7

Hi Guys,

I have designed a website and am having a few problems with it. the website is www.sunsetvalley.co.uk I have the fall out menus and all is done right in the PSD but there are some issues with sub menu links not being spaced correctly apart and are all different spacings - yet these are fine in firefox, opera and on mac.

Can anyone help me with this probable bug?

Thanks

Scott