making an active x control work in vista

1.made a simple active x control with a combo box and a public function. compiled and made the ocx
2. in client machine, unregistered the previous version using regsvr32 /u {file_name} and registered the new control.
3. in client browser, added the intranet site to trusted sites and set the security to low and to allow unsigned active x.
4. This arrangement worked and the active x was able to execute inside the browser.