Hi.
I changed but all cells are locked!

I need only column A is locked, after inserting the data into it.

My code is:
when typing in B2, enter data in A2
when typing in B3, enter data in A3
when typing in B4, A4 insert data in
and so on.
what I need is:
when typing in B2, enter data in A2, which is locked.
unlocks for typing in B3, enter data in A3, which is locked.
unlocks for typing in B4, A4 insert data that is locked.
and so on.