If ur connected to a Wlan connection u can't connect to an other.. to check ur connectivity got Wlan wizard in settings then conectivity and the got Wlan Wizard and check which connection is connected just disconect all and then try again for new connection ... to make an acces point for Wlan go: Menu, Setting , Connection , Acces point and make ur new acces point for Wlan and try it again.

Don't backup completly just do what u required only like contacts, pics and any other important thing .

I wish ur problem is solved . Thanks