Is it enough to have serial config in main vi or??

Hey

I am converting SR830 lock in amplifier from GPIB to serial config,for which i have added Visa in the main Vi.

With this when i run the vi,Query Instrument Id always fails.

So i disabled it and reading only the ID without checking if its right.When i do this,i get Error 1073807343.

I wanna know if i have to take the serial config even within the initiazi vi,if so how??