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HELP, PLEASE!!!!
can not access my administrater account - system not accepting my password
If you have no other administrative accounts you can use to reset the credentials, Microsoft's official policy is that there's nothing you can do. Source (see the post marked answer): https://social.technet.microsoft.com/Forums/en-US/05b059a2-51a0-47cf-b4b0-e6d6f25285ee/domain-admin-password-reset?forum=winserverDS
There are, however, some more subversive things you can do. Here's the one I'd recommend if you absolutely have to do it. https://4sysops.com/archives/forgot-the-domain-admin-password/