System.InvalidOperationException - When opening Payroll Reporting Centre

Hi,

We've got a file that I think used to be a standard file, and has been upgraded for payroll.  We've been running payroll in it all year, but never reported via STP.  Obviously now trying to setup and finalise at EOY, but getting a 

System.InvalidOperationException

Judging from a previous post in here, it seems like some kind of script needs to be run over it?  the details of the file are;

The Company file is Online

The last 4 digits of the serial is 8175

File ID 1

Thanks,Charles