Hi, sorry if you've fixed the snag already, but,, from reading the thread and some of the suggestions felt I had to step in,,,
Bring up the window for WIRELESS NETWORK CONNECTION PROPERTIES,
Tab WIRELESS NETWORKS,
HIGHLIGHT the connection you want to deal with,
Then click PROPERTIES,
TAB connections,
UN-TICK the box saying "connect when this network is in range".
Don't go messing around with other in-depth setting as previously suggested,
otherwise you may not be able to configure your own connection settings wirelessley.
Keep it simple and just work the network you don't want connecting.
