F-02 lsmw not picking data on amount field

HI

My client is on a restructuring process with effect on 01 June 2013 and we are creating new company codes.They have to upload the general ledger account balances.I have prepared an lsmw based on F-02 now on executing my batch in sm35 data is not being picked on amount field soon after posting key and account.it views screen with amount field blank and gives the message "No data for batch input session ....."

Regards

Rejoice