Apollo, do you use:
1 Smileycentral?
2 SPNG version 2.2.44?
3 Previously used handwriting plugin?
Solutions on yes:
1
uninstall
2 update to latest version at
http://www.stuffplug.com/
3 delete handwriting.dll from plugins folder
(C:\Program Files\MessengerPlus! 3\Plugins)