Perhaps to expand on what Mohana said:
On the "Report - OnInitReport()" trigger you need to add the code to set the option as the report opens, for example the variable for Log interactions is "LogInteraction"
So add:
LogInteraction := TRUE;
and do the same for the rest of the options
To prevent changes to the filters go to the "Sales header invoice" dataitem in the report and under its properties remove the ReqFilterHeading, ReqFilterHeadingML, ReqFilterFields & change the DataItemTableView to be "SORTING(No.) ORDER(Ascending)"
Cheers
Nev