are you succesfuly connecting to a wifi connection, when you wifi lights up white it will indicate a succesfull connection, you can go to the wifi set up and it will assist you.
if you use the blackberry native browser does it allow you to connect? you made need to change the permissions on opera to be able to succesfully browse. if so go to options/advanced option/applications/highlight opera/blackberry key/select view permissions or edit permissions/drop down the first option and youll see wifi, it will either say enabled or disabled. also you may be connected and not being able to browse becuase of the connection, i would suggest reading over the wifi 101 on cb