VCI-400 SE Ean Golden Edition! ACK not found

VCI-400 SE Ean Golden Edition! ACK not found

Hi everybody got a big Problem:
Wanna upgrade via PC load Current firmware Version…browse for v2.0…start and FirmUp says: ACK not found!..The VCI is still now in bootloader mode and i can’t use it…got my next session on Dec. the 1st. WAHHH need help please!
Notes: Got VCI-400 SE / Win 7 (64bit) / Vestax ASIO Driver 1.52 / Vestax v2.0 firmware (Standalone Mixer) / Ean Golden firmware v1.0 (0007004)