[Mediawiki-l] Watch List Problem in MediaWiki 1.11.0

[Rowe, Dolores A]

We are using MediaWiki 1.11.0.
In "my preferences", in the "E-mail" section, I have checked "E-mail me
when a page
I'm watching is changed".

After that, for the Main Page, I have the checkbox on the Edit page
selected which says
"Watch this page".

I made a change, but did not get an email.  I was able to go to the "my
watchlist" page and
see the change.  

What did I do wrong ?  Why didn't I get an email ?  What can I try ?

Thank you,
Lori