It seems like you're not very familiar with scripting, and changing a script without knowing what to do isn't a good idea. I'd like to explain what you did wrong, but I don't know if you'd understand.
Despite of that, I think you can fix this by replacing that specific line with:
code:
if(Origin!=Messenger.MyName)
Don't see this as an offense against you. But scripting isn't something which you can simply do yourself by changing what you think should be changed. It takes time to first learn the programming language (JScript) and then learn about Plus! scripts.
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