Cannot open .pps type files received as attachment in OE6

My computer runs on Windows XP Sp2 and uses Outlook Express 6. Loaded is the application "Microsoft Powerpoint Slide Show ". If I click on a .pps type file in Windows Explorer, that file opens and runs perfectly in the "Slide Show" program [that is, the application].
But if I receive an email in OE6 having an an attachment with a file name having the .pps extension, that file will NOT open. Rather, when I click on the attachment, and click "open ", a FIRST screen comes up saying: "Do you want to open this file?" This screen shows the filename and also has a line saying "Opens with Microsoft Powerpoint Slide Show ". So----I next click "Yes" ---to proceed to open the file.
Next, a SECOND screen comes up saying
"This file does not have a program associated
with it for performing this action. Create an
association in the Folder Options of control panel. "
I have done that! For a .pps extension, I have seen that the program for that is INDEED the "Microsoft Powerpoint Slide Show "
But the attachments of this kind STILL will not open.
Can you help me cure this nagging problem?
-----------Thanks! Lee Mitchell
NOTE: If I save the attachment to a some folder in my Windows Explorer, it WILL OPEN from there. But that is a long way around the barn, and a pain in the neck.

 

THANKS for help; it worked

You guys are just great. I followed thru the link you gave me, and it CURED the problem! The link was for the problem when running on Vista, but it gave me a second link to use with a computer running on XP. Thanks, thanks, thanks.

BTW, I can't get an OE email attachment-- which is an .wmv file-- to open correctly in Windows Media Player. Clicking the attachment to open it causes the WindowsMediaPlayer to open, but it just shows a blank screen and the attachment video does not run. Any easy cure?
----Lee

 

OK, I have done that. Thanks====Lee