Additional Data Tab B In VA01/02/03

Dear Experts,

I need some custom fields in sales order. That why I have implemented enhancement in program SAPMV45A 8459 through SE51. I have also taken my access keys as well.

Then I have insert new fields in VBAP table through append structure.

Now I am able to save data through additional data b tab in sales order. But i have written some login for validation in PBO and in PAI. It is not working

I am also getting some message related to NLS configuration. "nls configuration missing for language German"

Kindly help me in the given query.

Thankx in advance-