Yes I got the Solution to it ,I think I posted the update on the group,
anyway to disallow users to make there sites we need to turn off the self
site creation
which is located in the
1. Go to Share Point Portal Server Central Administration for Server
2. in that in virtual server and portal configuration go to Virtual Server
and Portal Site Configuration
3.Click the portal site name, once you reach the virtual server setting page
4. in that Automated Web Site Collection Management section click the
Configure Self-Service Site Creation
5.In that page make that radio button off for Enable Self-Service Site
Creation
this will disallow the users to create there own sites