DAC and LogonTriggers

hello

i have a LogonTrigger that rollback all logins.

i want to disable it. but i can't login... so i want to use DAC but i have some problem.

1. in management studio i use Admin:. for many connections and all of them can connect successfully! why?

(i read in books online

"To guarantee that there are resources available for the connection, onlyone DAC is allowed per instance of SQL Server. If a DAC connection is already active, any new request to connect through the DAC is denied with error 17810.")

2. after i connect using DAC i cant access all object such as databases or logon trigger!!!? why?

thanks

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