How XiboPlayer access xibo site from proxy?

hi friends
i install Xibo 1.7.7 CMS recentlly on the server of my network .
i want to run xibo player on pc from my network, but it can not connect to xibo server and appear this message :
" Status
The request failed with HTTP status 407: Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied. ). "

i have proxy server(ISA server) in my network for internet accounting .

i access to the internet and local site(xibo , …) from this pc and total setting is correct .
please help me !!!

I feel like I went back in time a decade or two (ISA proxies) but check the logs on your proxy to begin with.

Make sure whatever method of authentication is in use is compatible with Xibo (NTLM, Kerberos, Basic, …) perhaps you need to add the domain to your username (username@domain.com or DOMAIN\username depending both on age and methods in use for your system) or give the system a hint to resolve the proxy server.

But domain.local on a Windows system? It’s possible but odd since it could conflict with Bonjour.