Occasionally a record will get stuck in the Sending state if one or more SCPs fails to load the record. Usually an unsolicited message will be sent from SMS within 1-2 hours indicating this. A list of SCPs that have failed to load the record is provided with this unsolicited message; this list can be seen via the Activity Log screen in the detail (bottom) frame.
A problem like this is normally beyond the control of 8MS. You should call the SMS Help Desk to report this and SMS support will investigate the problem.
