desire 300 flash problem help

Starting flash process…
target rom version: 1.10.401.4
found large-zip header, file count: 6
processing file 1/6…
sending ‘zip’ (25341 KB)…
OKAY [ 2.889s]
writing ‘zip’…
(bootloader) rom parsing start …
(bootloader) rom parsing finish …
FAILED (remote: not allowed)
finished. total time: 4.185s
Flash process completed.
Flash not successfull, reboot will not be done

what problem bro please help:(