although you do not provide much information to go on, you may want to look at
http://www.interactivebrokers.com/discus/messages/153/3257.html
describing similar problems and suggesting solutions
looks like the Apple Airport is a standard 802.11x
http://www.apple.com/airport/
two other setup links:
http://www.stanford.edu/dept/itss/services/wirelessnet/support.html
http://web.mit.edu/is/desktop/wireless.html
"By withdrawing from the DTC and requiring paper-based stock certificates, the companies claim they will be able to eliminate the improper trades. The companies trying to exit the DTC are centred in the off- exchange bulletin board market. The dispute is expected to be limited to such...
it is OK to have files which you are unable to delete, just unselect them and delete the rest
it could be that IE loses track of itds temporary files (e.g. i the computer was not shut down correctly), just clean up the files in the directory