Subscreen Issue in Modulepool

Hi Experts ,

Do we have any configuration to allow maximum of 7 or 8 fields on subscreen. Becuase when I am tyring to add one more field to existing screen its not showing on the screen but i have defined it on the screen layout . but When I define same field at 7th line of screen I could able to see the field but If I add after 7th line its not showing the field on screen.

i have checked field atttibute and also SCREEN structure is not changing any where .

So I guess there might be sub screen condifurations some where . So if you have face this probelm please give pointers .

TCODE : PPOME (TAB : account assignment)

Screen : 0504 .

Thanks

kamesh