Firmware update not working

I am trying to update my firmware on the software version 1.2. Using a https connection. Everytime it indicates an error and the firmware is not updated. Can you tell me why and how to resolve this issue?

[h=2]1.1Firmware update with HTTPS)[/h] Here is the description of the HTTPS problem
For the firmware update, the device accesses the path "... / RMS / Setup / FirmwareDownload.ashx" to download the firmware file. However, if a redirect to HTTPS is set up this will not work because the device does not support HTTPS (not technically possible)
Workaround:

The following path must be excluded from the HTTPS redirect:"/RMS/Setup/FirmwareDownload.ashx"

Maybe it's an option the whole "/Setup" Exclude directory from the redirect. Then this would be the necessary entry in web.config Insert before the last line::
<system.webServer>
<rewrite>
<rules>
<rule name="Force HTTPS" enabled="true" stopProcessing="true">
<match url="(.*)" ignoreCase="true"/>
<conditions logicalGrouping="MatchAll">
<add input="{HTTPS}" pattern="off" />
<add input="{REQUEST_URI}" pattern="/Setup/" negate="true" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}{UNENCODED_URL}" appendQueryString="false" />
</rule>
</rules>
</rewrite>
</system.webServer>