Conditional Statements II

Those are the fields that I have that I want to write a conditional statement for in a PDF form that I am creating in Adobe Acrobat Pro X. In the form if I tick the checkbox I would like FP1 to get the value from QxHxW1. If the checkbox is not ticked I want FP1 to register as "0". I have been trying to do this with different tutorials that I have found online and each time I get some sort of SyntaxError.

is there anything I can do to fix this? Am I way off with the way that this is written?

FrenchPane1 is a checkbox

FP1 is a text box

QxHxW1 is a text box