Ignoring request from unknown client 1.2.3.4.:****

Having installed Mysql4.0, I recompile Freeradius 1.0.5. It seems Freeradius and Mysql works well when I enter : radiusd -X. However, when I use the 'UserName' and 'Password' in the 'radcheck' table to test , I get the following output from Radius Server: rad_recv: Access-Request packet from host 202.117.49.26:3978, id=12, length=47 Ignoring request from unknown client 202.117.49.26:3978 --- Walking the entire request list --- Any suggestions?