Hello, Newcomsas.
This is not one of the known issues, but we'll try to help you troubleshoot it.
You should be able to access an application from another machine. If you can access an application from the same machine using machine's real IP or real hostname (not 127.0.0.1 or localhost), but not from another machine, it is almost certainly a connectivity/networking issue of some sort, because UltiDev Cassini binds ports to all IP addresses.
Could you please let us know what OS you are using? Also could you take a look at Windows Event Log (Application) and see whether there are error entries related to UltiDev Cassini?
Best regards,
UltiDev Team.
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