SecuritySuite - SuiteCRM and CE Teams

Hello, I followed typical setup. I created "Greenvale Only" role and assigned permission as outlined in typical setup. Then i created "Greenvale" group and then added user "Khalid" to that security Group. Finally, I check "Greenvale" account and assigned to "Greenvale" group. When logged on as user "Khalid", he can't assign tasks, cases etc to user outside of his group "Greenvale". It says, "You do not have access to this area. Contact your site administrator to obtain access.". However, when i logon as admin or any user which is not restricted like above sees the task created as outlined above. So basically, although it gives the error "You do not have access to this area. Contact your site administrator to obtain access." it does create the tasks and assign to the proper user invisible to the user who created it originally. Any idea why its throwing this error. I did rebuild roles and then quick repair and rebuild several times but it did not have any effect. Its really annoying as it seems to be working behind the scene but not showing and creating error and keeping the task invisible to the creator. Same thing applies to case if i follow the same procedure to create a case. Please help. Thanks.