Project Acct Timesheet Integration with e-Connect

We are trying to create an integration with e-Connect for Project Accounting Timesheets. We are receiving the following error -

Microsoft.Dynamics.GP.eConnect.eConnectException: Sql procedure error codes returned: Error Number = 1256 Stored Procedure taPATimeSheetLineInsert Error Description = You are not allowed to have negative actual quantity Node Identifier Parameters: taPATimeSheetLineInsert PATSNO = 2 LNITMSEQ =

We are passing a postive quantity into a standard timesheet.

How would I troubleshoot and resolve this?

Thanks Jim