It looks like you have V1 and V2 defined in 2 places.
You have them defined in PLC_PRG as local variables
AND
You have them defined in the I/O table.
Because of this, when you are writing to V1 or V2 within you PLC_PRG, you are only setting the values of the local variable.
Try to comment out V1 and V2 definitions in PLC_PRG and see if that works.