cannot update firmware atf box

hi all
i have a box atf and i try to use but the box ask me update firmware like this:
Please update your Box Firmware

* Follow these Instructions
1. Disconnect any phones connected to ATF Box
2. Go to "Product Support Tab"
3. Go to "Box Tools" Section
4. Click "Update Firmware" button

* Make sure you put ATF Software in Windows
FireWall Exclusion List

* Make sure you put ATF Software in your
Virus Scanner Exclusion List

i have do it the instruction and the update not run

always server error ………can somebody help me ?