Acct-Input-Gigawords

Hi, i have 2 questions and i hope you'll help me. I use the freeradius in combination with mysql-server for accounting and authorizing. The first: how do i use the Acct-Input-Gigawords and Acct-Output-Gigawords Attributes with "FreeRADIUS Version 1.1.3" and "FreeRADIUS Version 1.0.2" and PPP 2.4.4? I set up the fields in the mysql-table but they do not get filled with data. The second: Is there a way (radius or ppp) to get the Accounting-Data on-the-fly (realtime) or maybe all 2 hours without disconnection the actual session of the user? Regards lars