Dell Gen 4,Win XP Pro,OE6,IE6 sp2

When I try to open a PPS file recd with email I get: No program associated
with this file. Please create an association in Folder Options

In OE Tools Options there is nothing checked to block or otherwise interfere
with email attachments

I can save the file to anywhere on disk, click open and PPV pops up and the
file opens immediately with no problelm

In Folder Options..I have MS PPS;PPSM;PPSX;PPT;PPTM;PPTX, all show: Open
with MS PPV.

Sent myself a PPS file and same problem so I am missing something somewhere

Any suggestions appreciated...Im stumped.
Thanks in advance