well,,when I want it to display whatever is stored in variable #006 I just do \v[6].
Seems to me like under label 4,,you display \v[006] and \v[0007],,I don't know if that is the cause of the error or not. 006 (2 zeros in front) and 0007 (three zeros in front) have different context. Try \v[0006] perhaps? or \v[007]?
Or you can also try \v[6] and \v[7] <--- that should work.