testlink 1.9.16 - No move next case box displayed

[mtarifa]

Hello. We had install testlink 1.9.16 and 1.9.17 dev with LDAP authentication, and we observe that with using user with admin role , "Pass, Failed, Blocked buttons and Move to next case" box is not appear on execute test (also the delete option for actual tests runned) , if a user is changed to "tester" , this box appear.

We dont know were to look for this problem.

Thanks in advance