flyspell and abbrev

[emacs user]

hello, I don't know if this is a bug or some option that I need to set, but 
it's been there for a while:

emacs-22.0.98 on gnu-linux redhat
emacs -Q
open a new file t.txt
turn flyspell on
set flyspell-abbrev-p to t

type
Cho
the word is highlighted as a spelling mistake.  use middle mouse to save it 
as a correct word.

type
CHo
highlighted as a spelling mistake again,

use middle mouse to correct to Cho.
type CHo<space> the word is not automatically corrected to Cho even though 
it is now in the abbrev table.

thanks...

_________________________________________________________________
Mortgage rates near historic lows. Refinance $200,000 loan for as low as 
$771/month* 
https://www2.nextag.com/goto.jsp?product=100000035&url=%2fst.jsp&tm=y&search=mortgage_text_links_88_h27f8&disc=y&vers=689&s=4056&p=5117