Only allows streaming one way. Why?

[Patrick]

I have everything installed on both pc's and separately they both run Steam games okay but one is slower than the other as its a few years older. Steam will only let me stream games from my old computer TO my host gaming computer, but not the other way around, I don't get the option on the play button to stream from my powerful rig. I want to be able to play on the old pc in a different room using the hardware in my gaming pc, but no luck. Can anyone help on this?
Thanks.

[slouken]

Maybe this helps?
https://support.steampowered.com/kb_article.php?ref=3629-RIAV-1617#compatibilitymode

Sometimes when Steam crashes Windows thinks that it needs to be run in compatibility mode, which prevents streaming. Josh McCarty has written up detailed steps on how to fix this at:
http://joshmccarty.com/2012/01/turn-off-compatibility-mode-for-steam

[Noitpecxe]

I have the same issue. And the referedto article didn't help. Any more ideas?