I tried to delete emails from the email folders but it doesn't work. I
click on the "delete" button on Outlook Express, I tried pressing the
"delete" button on the keyboard. However both ways doesn't work, the
email is still where it was and doesn't move to "deleted items" folder.

I tried dragging the email into "deleted items" folder, OE poped an
error message window with something like "Error processing request",
without any error code.

I can successfully delete emails within "deleted items" folder with
"delete" key on OE or on the keyboard.

If I create a folder inside "deleted items" folder, I can move messages
in that new folder.

I tried to compact folders but during compacting process, OE pooped an
error message "The folder is currently being used by another
application", I can choose "OK" or "Cancel" for response, if I choose
"OK", the compact process will continue. I just had OE running in my
WinXP sp2 and no other email fetching tools running at the background.
How can I make the "delete" button work again?

Thanks for any suggestions.

Regards,
Louis