None of my ringtones on my O2 HTC TyTnII will work all of a sudden. I have
WM 6.1 Professional

If I click on "Settings" and "Sounds & Notifications", then click the
"Notifications" tab, all the ring tones are listed but when I select one and
hit the play button, it won't play. All that will work is Aloutte midi file.
If I select any other file than Aloutte, my phone won't ring to announce an
incoming call.

If I open File Explorer and open the directory Windows/Rings, I can see all
of my ringtones listed. If I click on a file and open properties, it shows
them all as wma files with file sizes next to the file name. If I double
click any of the files, I get the error message "There is no application
associated with "File name". Run the application first, then open this file
from within the application".

This seemed to happen after installing and running SKTools. I'm wondering if
the Registry Cleaner Tool messed things up. I ran the SKTools backup utility
to restore my data but it didn't fix things.

Does anyone have any ideas how I can get all my ringtones to work again?

Thanks
Peter