At a DM server you will never see or hear "Counter terrorists win" or Terrorists win". Players just kill all the time. That's all. So if the bomb is gone, then the DM is working as it is supposed to work.

Yeah But see this

I found solution for your DM issue. I guess you have downloaded and installed Bailopan's DM.
Go here: "..\cstrike\cfg\cssdm\"
Open the "cssdm.cfg" file with notepad.
With Ctrl+F search for this command: "cssdm_allow_c4"
Set the value to "0", save the file and test.

Yes, I did this, And T can not plant the bomb, of course CT can not destroy the bomb, and T can not kill all CT...
==> T can not win!

I don't understand why I can't do that:

Yes But not successful:

Plz help me

can I become a in-game admin ? with mean I can use game console to manage the game.

 
That's what we are saying!
Yes, you can set yourself admin to your own server. In this way you can ban, kick (and much more) players, set the next map and many other things. To do that you have to edit the admins.cfg with notepad and type your in-game name and your SteamID to the correct place. The instructions are simple and clear at the first page and post of this topic. But if still it's difficult for you, i will make an admins.cfg and send it to you. Then all you will have to do is to replace the old one with the one that i will send you. But it's better you do all the process on your own, so you learn.
 
 

Yes I see
However I can't test the game console.
After editing config file, I tried to connect to my server and play, I typed sv_gravity 9 and It said only sever admin could do this...
I also tried to type that code in sever cmd windows and It worked well...

So what should I do ?