How to make Hidownload, Net transpost and others download through open ways?

[kop]

Hello
How to download a *.ra stream file? Hidownload, Net transpost, Streamdown and
others cannot download, but all stream Players, like RealPlayer, play
streaming files through my LAN.
The LAN has a security wall probably, therefore the Hidownload,
Net transpost cannot download. How to make Hidownload, Net transpost
download through open ways, which RealPlayer plays through? The Hidownload, Net transpost and others can download through other connections.