How to kill remote session via command line

C:\Documents and Settings\datagram>qwinsta /server:10.10.10.x

SESSIONNAME USERNAME ID STATE TYPE DEVICE

console 0 Conn wdcon

rdp-tcp 65536 Listen rdpwd

rdp-tcp#4 datagram 1 Active rdpwd

administrator 2 Disc rdpwd

C:\Documents and Settings\datagram>rwinsta rdp-tcp#4 /server:10.10.10.x