asp.net roles how to create manual on my server 2008

Hi, how to create roles in sql server 2008? I tried manual to insert in the table aspnet_Roles and aspnet_UsersInRoles but does not works.
aspnet_Roles: ApplicationId    RoleId    RoleName    LoweredRoleName    Description E5B03A74-3514-45F1-8644-F69FE756358D    44FAEFAC-AB48-449F-8AA7-F2050863BF36    admin    admin    NULL aspnet_UsersInRoles: UserId    RoleId EE65F09E-E20F-4EBE-A3C9-0F4A62B41545    44FAEFAC-AB48-449F-8AA7-F2050863BF36 aspnet_Membership: ApplicationId    UserId    Password    PasswordFormat    PasswordSalt    MobilePIN    Email    LoweredEmail    PasswordQuestion    PasswordAnswer    IsApproved  ...