Screen Exit for IE01

Hi all,

I have a requirement, that I have to add two fields to IE01 as well as for IE02, IE03. I am following the below link.

http://scn.sap.com/docs/DOC-54073

But i am getting error in   ZXTOBU02 include which is in EXIT_SAPLITO0_002 functional exit.

I am adding these lines.

  E_UPDATE_DATA_EQ-ZZITO_ELEC_SCHL = EQUI-ZZITO_ELEC_SCHL.
  E_UPDATE_FLAGS_EQ-ZZITO_ELEC_SCHL = 'X'.

But I am getting 'The data object "E_UPDATE_FLAGS_EQ does not have component called 'ZZITO_ELEC_SCHL' error.

How can I resolve this???

Please Help

Regards

CK