To Display fixed values instead of Short Description in ABAP Webdynpro

I am using knb1 table - ktzlf field( DropDownByKey ). My requirement is to get the fixed values, but am getting short description. How to resolve it???

Eg:

fixed values                                   short description

     A                                                  partially delivered

     B                                                  delivered    

     C                                                  not delivered

     SPACE                                        processing

Thanks in Advance.