Payment/authorisatin to Superfund

I have an employee who is with Australian Super. Under the Super Funds list in MYOB it is shown with the USI of  STA0100AU (per ATO portal as his Stapled Fund).

When I process via 'Pay Superannuation' using the Record button, I get a x against this line and it is declined.

The detail shown against that employee in his card and on this Pay Super page is correct and ties back to the MYOB Super Fund list.  All other 60+ employees are going through fine.

Any idea why this is declining?

Thanks in advance