Changing security level

Hello List
How can i change the security in a report which is at level to(MEdium to full security) to 0 security(No security)
Can i do it n Security workbench or do i need to create a version for it.

Plz help

regards
Dev

its done when you create the version. I think if you log in with the use who created it you could change it.

Thank You!!