RM-30410: Warning: Single Record property ignored for non-control block

Hi gurus,
I have one block, as oracle default behavious is that when any user enters record and during that if he/she hits down arrow key then it gets to next new record, i want to prevent this behaviour.
In other words i want that user should not enter second record and if he or she needs to enter second record after saving first then user can only do if he navigate to the form second time.
In property pallete i put yes to single record but when i compile the form it gives me following warning
FRM-30410: Warning: Single Record property ignored for non-control block Employees
Created form file C:\my_forms\employees.fmxPlease seeks help that how can i sort it out.
Thank you
Hina

if he/she hits down arrow key then it gets to next new record, i want to prevent this behaviour. Change the block's key-down and/or key-nxtrec trigger to
begin
null;
end;(or give the user a message "Key not allowed here").

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FRM-30410: Warning: Single Record property ignored for non-control block

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RM-30410: Warning: Single Record property ignored for non-control block

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