Shoutbox

I cant understand why. Every time i try to rick click on it, this little dialog appers. I'm using Plus! 4 . The install was ok and everything seems to work fine.



I'v tried many passwords, but none work, clicking cancel lead me to another dialog! The same as this, but with the title "Password for Sponsor Afreement (es).rtf" and again closing the dialog or clicking cancel the same, but now (fr).rtf then (ne), (pt) and finally only "Password for Sponsor Afreement.rtf".
I thought i was some adware, but spybot found nothing, and neither BitDefender. I'm sure this is a bug of Plus, since it doesnt happen with anyother setup file or any file at all.
I was checking right now, right clicking on the Plus! 3 setup and guess what?
i get a "Confirm" dialog say this "Invalid size of check sum of file unsupported compression format - Native error 00008. File processing error, possibly disk full" Abort, Retry, Ignore. 

This could be another program interfirin on plus install ? Because, no other file get me this stuff!
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Windows XP Pro, SP2 (5 Gb free space)
WLV 8
Messenger Discovery Live
Msg Plus! 4
AMD Athlon 2 Ghz, 1Gb Ram, Nvidia tornado 128 mb.

Possible progz buging with plus:
Winrar, Zip Genius, Bit Defender or somehting else that appear on the right click menu...
(Hope i posted on the right forum, and that i'v made my self clear even not beeing native speaker of english)