Do you really mean xlxs?
If it were xlsx, it would be Excel 2007.

Excel 2007 compatibility pack for Excel 2003 users:
http://support.microsoft.com/kb/923505
Download:
http://www.microsoft.com/downloads/d...displaylang=en

--
David Biddulph

"Sue" wrote in message
...
I saved files onto a memory stick from excel. Now that I need them they
are
showing up with xlxs as the extension and I can't get them to open. What
is
this?