What have I done wrong. I now cannot double click on a file to ope
 

I must have done somthing wrong as now the only way I can open an Excel file
is to open Excel and then open the file through "File" "Open" I am using
2007 however in early days I converted the file from 2003. Also I am saving
the file as an Excel 2007 Macro-enabled Wookbook (*.xlsm) Prior to this
happening I had opened a second window of the same work book and could not
work out how to close it so I just closed the second window and saved the
file. Could this be my problem? Any sugestions would be appreciated.