You may need to contact the gateway administrator if you are having any problems connecting to the gateway. If your gateway administrator setup their contact information on the gateway you can contact the administrator from the Site list.
iOS Contact Gateway administrator
From the Sites page select the blue chevron to the right of your gateway name. The page will flip to show "back of page" information about how to contact your gateway administrator.
Android Contact Gateway administrator
The gateway administrator support page is not currently available on the Android client.