Windows 2003 Domain Admin Password Recovery

Hi,

Im laptop i have two operatings systems
1.Windows 2003 server sp2
2.windows 7

I have created a domain and assigned password to it in windows 2003 server,but i forgot the windows 2003 domain administrator password,how recovery and domain password or how to disable the domain.

I tried very much by seeing the windows blog but not worked..

Could any please suggest to me…
either to disable the domain / recover the domain admin password