I searched for playstation 2 game on the internet then wrote it on a dvd and when i run the dvd on the ps2 ?

May be...

it didn't work. what the mistake that I have done and what have I to do ?

you have to have a mod chip installed and they use a different format on the disks.

http://www.ps2-chips.com/



http://www.consolesource.com/ecomm/catal...



http://www.psreporter.com/mod-chip.html



http://www.ps2cover.com/index.shtml