Well that solved the problem fast and perfect. Thank you!

Hi

I'm new here and building 3d printer in my free time.

I just set up a Duet v0.6 with the latest firmware and Web Control:

Firmware Name: RepRapFirmware for Duet-0.6-0.8.5
Firmware Version: 1.16 (2016-11-08)
Web Interface Version: 1.13

After connecting to the duet via Web Control I'm getting the same error like appjaws after ~55 secconds while doing nothing:
Communication Error
An AJAX error has been reported, so the current session has been terminated.
Please check if your printer is still on and try to connect again.
Error reason: timeout

I reestablished the connection several times and got the error message every time after 55 secconds.
Thanks for every hint and help. Just tell me if you need further information.

Edit: I'm using windows 7 pro and the error appears in Firefox and Chrome