mario221, you have wasted half of your time repeating the same thing all over again about contacting the admin to gain access. Don't you see the problem that people are facing? It is obviously clear that they are the admin but they can't log in as an admin somehow. You were not helping at all.
I currently have that problem. I have tried system reg "regedit" to change the dword but to no avail. I have tried net user administrator /active:yes, system boot disk program stuff, almost everything.
My last option is to reinstall my vista. But I still have faith that this can be solve.