Hi Rafeal
We would recommend that you first upgrade the MTCAP-L4E1 to the latest firmware version 5.3.0 then factory default the device by holding in the reset button for 10 seconds then reconfigure.
The MTCAP 5.2.0 firmware van be found at the link http://www.multitech.net/developer/downloads/
If the problem persists open a support ticket at https://support.multitech.com/support/dashboard.html
-Best Regards