Transmission protocol changes to HTTP

I have configured an internet camera and its working fine everywhere except
systems with windows vista as operating system. whenever i am trying to
connect i get a message "because the connection problem of the environment
the transmission protocol changes to http" In all the systems i am getting
this message but when i click ok i can view the video but in vista its keep
on showing "connecting" and nothing happens... Pls help me out to sort out
this issue..

thanks..jag