Excel 2007 : xlxtrfun add-in for excel 2007

Hi,

I use the same functions (xlstrfun) as http://www.excelforum.com/excel-2007...or-2007-a.html and have recently migrated from excel 2000 to excel 2007. In that thread, the user mentioned "importing" the add-in.

I am trying to load the add-in into my excel 2007.

I go to excel options, manage add-ins, browse,

Then I browse to the copy of xlstrfun.xll on my PC and select it.

However the add-in then does not appear in the available add-ins list box.

Am I missing some action?

How exactly do you "import" the add-in.

Thanks

Alan.