Auto enter sequence

If I have a text field (eval_id) When I auto increment through Servoy.

next value : E0001
Step : 1

Why does it show as

next value : 2
Step : 1

Should it not display as

next value : E0002
Step : 1

It is incremented as E1, E2, E3 in the backend (SQL 2000). It seems to remove the zeros as well.

Thanks,
Erich