dcpromo.exe Administrator Password required error

i have still face the problem im using following command

net user Administrator 1q2w#E$R5tpasswordreq:yes

plsss any body help me plssssssss 

before i use this command i re install server 2008 r2 enterprise then use this command & when i run dcpromo command the same error

"The local Administrator account becomes the domain Administrator account when you create a new domain.  The new domain cannot be created because the local Administrator account password does not meet requirements.  Currently, a password is not required for the local Administrator account.  We recommend that you use the net user command-line tool with the /passwordreq:yes option to require a password for the account before you create the new domain; otherwise, a password will not be required for the domain Administrator account." 

plsss help me