Changing a mailto:link causing error #1056

Question

I am editing a Flash file and I need to change a mailto: link. When I edit that link to change the email address I get several instances of error #1056.

I am no Flash guru, I am just wondering why such an arbitrary change would break everything and where I should be looking to solve the problem/

Thanks

Edit: Here are the errors:

ReferenceError: Error #1056: Cannot create property baseBackground on com.***t.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property backgroundHolder on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property backgroundMergeHolder on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property content on com.***t.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property busyVisual on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property nav0 on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property nav1 on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property nav2 on com.***.csg.view.CSGWebsite.
ReferenceError: Error #1056: Cannot create property homeHotspot on com.***.csg.view.CSGWebsite.

I am totally confused, as some of the errors have no ActionScript assigned to them, such as baseBackground.