Personally, I'd upgrade to 11 as soon as possible. Even if you get this to work, you are using a copy that is very limited compared to what is currently possible and is unlikely to be useful on newer computer systems much longer.
I think there's some kind of "xp compatibility mode" you can use with 7 to run older software. Haven't need this myseilf so I'm not sure if this is true and how to set it up.
Anyone else out there know anything about this?