Answer:
hit enter & replace the SEND Button
New Windows Live Messenger with SEND BUTTON
As Windows has forced us to upgrade to "Windows Live Messenger 9.0 (2009) 14.0.8089.726" we have no chioce but to surrender. However, there is a workaround.
SOLUTION
STEP 1 ~ Of course you will need to upgrade to the new version "Windows Live Messenger 9.0 (2009) 14.0.8089.726".
STEP 2 ~ Download & install "Messenger Plus! Live 4.82.368".
STEP 3 ~ Go to http://www.msgpluslive.net/skins/view/131-My-Live-Messenger/Download & download "My Live Messenger 0.6".
STEP 4 ~ Install the new skin & restart WLM. OK, enjoy
This new skin looks very similar to the old WLM with a few minor differences.