Fastboot Won't Flash Files

When I try to flash a file to my phone, I receive the message: Failed (remote not allowed). It will allow a recovery flash from RUU screen only, but IMG and Zip files are a no go. USB debugging is allowed.

version: 0.5
version-bootloader: 3.19.0.0000
version-baseband: 1.09.20.1112
version-cpld: None
version-microp: None
version-main: 6.20.654.3
version-misc: PVT SHIP S-OFF
serialno:
imei:
imei2: Not Support
meid: 99000499410010
product: m8_whl
platform: hTCBmsm8974
modelid: 0P6B70000
cidnum: 11111111
battery-status: good
battery-voltage: 0mV
partition-layout: Generic
security: off
build-mode: SHIP
boot-mode: RUU
commitno-bootloader: 205bdca3
hbootpreupdate: 11
gencheckpt: 0

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