Not able to navigate to column range in excel

[prajakta3 (Prajakta Magar)]

Hi,
I am using read range inside excel application scope, and later i am editing column range that i want to iterate through by giving selector, image -

But once it is worked, and later on giving me error “selector not found”
I have tried with different selectors

Has anyone know other way to move to “C2” or column range.

Thanks,
Prajakata