Problem in ALV HEADER

Hi Experts,

I have a problem in Alv Header. In front of material No zeros (Material No :000000000000006151 ) have come. i don't need zeros. i want only single vale 6151.

i am using this logic in Alv Header

IF MATNR-HIGH EQ SPACE.

CONCATENATE 'Material No : ' MATNR-LOW INTO TEXT1.

ELSE.

CONCATENATE 'FROM MATERIAL : ' MATNR-LOW 'TO MATERIAL : ' MATNR-HIGH INTO TEXT1 SEPARATED BY SPACE.

ENDIF.

Plz send me ASAP.

Thanks & Regards.

Sreedhar.