First, if you had tested previously your board, do a hard reset pushing the middle button for 20 second or more (when orange light is flashing).
STEP 1: Connect to LinkIt Wireless Created
STEP 2: Go to local web (mylinkit.local) and set a new root password
STEP 3: Go to Network Tab, select Station Mode
STEP 4: Select Your Private Network and enter the Password (WPA)
STEP 5: Enter the LinkIt Home Page, but now over your Private Network
STEP 6: You can view the current IP of LinkIt on your network
thx for read, don't forget respect this ;)