Love your utilities, they are all great!

I have a question about this one though:

When using the Line Order or Magic ('O/M') setting, documentation says you should use (for magic number) 'MYYYYYYYY'.

I have tried (for magic number '3333')

'3333'

'M3333'

'M00003333'

'MYYYY3333'

...but it doesn't work for me. Which is the correct setting? Could it be something I'm doing wrong? 

Thank you