Yealink time settings and logo and firmware management


I have got Endpoint Manager commercial installed but I m having difficulty in setting various things with Yealink t28p

1 Cannot update firmware using firmware options in Firmware management. when I drag the firmware item from available options to slot 1 and slot2 nothing happens. also when i go into the template it only shows two options as "Recomended"
2. cannot change logo using the logo option
3. my phone does not show proper time as per the freepbx server
4. don’t have any options to create remote phone directory for all t26p phone

Any help on the above issues will be helpful

Kind regards