I have a question

Old domain I had installed TSUE v2.0 tracker is down 14 days.Now I have a new domain,have a newly installed TSUE v2.0 We have 2433 registered users from the old tracer,it is possible the old user to the new database

Yes you need to export the users from the database and import it on the new site.

and how to export,on the new site?

I tried,MySQL reports an error

What r u doing exactly !!!
If u have the old DB u should only edit the config files in tsue to work with your old DB

1- Import old DB to your new domain phpmyadmin or through ssh if its big DB
2- edit config file in your tsue files to work with the imported DB
3- fix site url in DB and that's it you're done

I do not understand how you think,edit config file

edit this file library/config/database_config.php

Ok he can use phpmyadmin
1- drop current users table
2- import the old users table that's it

I have done so I have no access to AdminCP

1.table drop current users
2.import the old users table.

what do yu mean no access.. yu need to login via your old site username and password , instead of that in freshly and invites users via emaill

I do,I put new table users drop and I put the old users in new table..not work

listen buddy dont waste your time no one will help here.. do what i said do a fresh installation and go back to your old database via phpmyadmin import users table to excel you will get all users emails just invite all this way is very good .instead of runing to restore backup

Yeah,I saw here do not help they just want money,money,money

Password ok.but I can not log in!

Restoring just one table may not work, you probably should just restore all the tables and then change the site name to your new site url etc...

just use the old database and change your site url in the admincp settings.