My admin account is not able to open, i have tried the password and it not be accepted.

How can i reset it?

Reset it with click on forgot password

Resetting a forgotten password

https://www-secure.symantec.com/connect/downloads/how-reset-sepm-password-121x

Edit

Raise the case to recieve the resetpass.bat from symantec tech support

How to create a new case in MySupport

http://www.symantec.com/docs/TECH58873

OR 

Phone numbers to contact Tech Support:-

Regional Support Telephone Numbers:

• United States: https://support.broadcom.com (407-357-7600 from outside the United States)
• Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
• United Kingdom: +44 (0) 870 606 6000

How to Reset Symantec Endpoint Protection Manager Console password in SEP 12.1

https://www-secure.symantec.com/connect/articles/how-reset-symantec-endpoint-protection-manager-console-password-sep-121

resetpass.bat available below download

https://www-secure.symantec.com/connect/downloads/how-reset-sepm-password-121x

Thanks, i have got the password.