Copying the old record fiels value to a new record

I am trying to get a field value from IT0001 old record to a new

record as part of Position Change Action. In the Infogroup, I

have "INSS" for the IT0001 so that it creates a new record with

new Payroll Area, as required. Also this is a required field as

the users would enter the value as part of action. I have given

the code as below as I need SACHP field to bring the value from

previous IT0001 record:

0000 00 01 P P0000-MASSN='A4'

0000 00 03 P PSPAR-SACHP SPACE

0000 00 05 W PSAVE-SACHP=P0001-SACHP

I am not able to get the desired value in the field and on saving

IT0000, this field is coming-up as blank in IT0001.

Am I missing something here? I tried doing with an 'I' Statement also but no use!

Any help is appreciated!