push button macro's don't work properly

OS - Win 7 Pro

I am trying to give some users access to LO and others will be using Excel 2003 and eventually 2013.
I have created a push button that opens another document (created using excel 2003).
I save the document in xls format.
When I open it in Excel, the push button does not work (it seems to come up in edit mode)
Any help would be appreciated.