Cant Access Applicatoin GUI Remotely (SSH)

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http://www.unix.com – Greetings! Theres an application in my RHEL 6 server that has a GUI (which we'd like to use). When I run the AppGui.sh is says it needs Server X11. I know its gotta do something with X server (and I installed it).I found some tutorial for auto configuration and then I was supposed to access the server with "ssh -X myid@serverip" but it does nothing.(did this from putty) What can I do to access this application's GUI remotely from a Windows Machine? Thanks in advance! (HowTos)