the character

the character with the name already exists


I can't play the game.all time dc and say this "wotlk the character with the name already exists "

Someone can help me?!

"the character with the name already exists" is because you leave the game with random disconnects (instead of regular log out)

So that is not a big deal (just wait 60 sec before to log in again)

your issue are the random disconnects.
When does it occur?

just during the game. its a bad thing during the raid. it does it without addon.

Don't panic when that happens, it takes only 20 seconds for your character to get removed from the world so that you can log back in.

When you disconnect for whatever reason, your character is saved in the world for up to 5 minutes (which would allow you to skip log in queue if there was one). When you try to enter the game while your character is saved, you will get that message and you will trigger a logout for your character. Since logging out takes 20 seconds, that's how long it takes before you can enter the game again.