When connecting OBiWIFI to your AP using security option of WEP and you see status for your OBiWIFI shows "Authentication fail to xxxxxx":

If the Wireless Security that you have set in your wireless router isas such,the authentication failure maybe because OBi is configured to usePassphrase ("ExcellentWiFi") as password and/or selecting wrong Key Index.

The result shows that the OBi202 is attempting to connect (and/or show as connected) but does not receive an IP address and does not connect to your wireless router.
When you see the "Authentication fail to xxxxxx" message or "Obtaining IP address from xxxxxx..." for more than one minute, please verify your password and Key Index. Please use hex key instead of using ascii passphrase.
For example: if you configure your wireless router like the picture above and your Passphrase is: ExcellentWiFi then you should enter 143565037F4223B04ACD5741B5 for the password (if the TX Key index is 1 as above picture shows) and select '1' as Key Index.