FBL3n screen layout in Material field

Hi Experts,

I had done config. for FBL3n report in Special Field

BSEG MATNR Material

BSEG MENGE Quantity

when i was see 3 GL A/c report.

1) INVENTORY GL a/c Material Code is blank display.

2) LOSS / GAIN PRICE VARIANCE, GL A/c Material Code is blank display.

3) GR/IR CLEARING GL A/c it is updated with Material Code and Quantity.

in GR/IR two line item is display one is GR (WE) & IR (RE)

In IR line item Material Code is display.

Why Material Code is not updated in GL INVENTORY & LOSS / GAIN PRICE VARIANCE ?

Please Guide?

Regards,

Jemes