Tables Refresh

Hi,

i am customizing the Sapb12005. in that i created two new addons.

and Userdefind tables. in testing somany rows are added to that tables.

in that somany doucuments are created. how to refresh all my userdefined tables.

docentry,docnum should be starting from '1' .

plz give help me asap

Regards,

Nagababu.