Ad Hoc Wireless

I configured a Ad hoc Connection in my USB Wireless and marked to save the
Connection! all good in here! The Connection functioned perfectly and I
obtained to share archive and connection of Internet with other people
arround me, But if I to want to exclude this connection, how make I?
Therefore all time that I go To search for new conexoes with my Wireless,
appears this connection Ad hoc that I made before!

How can i Exclude de Ad Hoc Connection who i Made before??
obs: I'm from brasil, sorry by the english!