X11 Forwarding over SSH w/ Putty

I am trying to forward X11 to my local computer using putty and ssh.
I have tried this before with another remote server on my local network and it worked fine.
Now I am trying the same with a remote server and I get the error message "Can;t open display localhost:0.0"

In putty I have set the machine to X11 port forwarding on localhost:0
I have also started an Cygwin X-Server on 0.0.
My DISPLAY variable on the remote machine is set to localhost:0.0

How can I find out what is wrong?
tomanizerAsked:
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binary_1001010Commented:
X-windows forwarding :

To enable , change the line X11Forwarding yes
In /etc/ssh/sshd_config , then do a :

service sshd restart

Also, remember to change the DisallowTcp=false in /etc/X11/gdm/gdm.conf
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_iskywalker_Commented:
to assure it works:
ssh -X myremote
export DISPLAY=myhost:0.0
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tomanizerAuthor Commented:
Thanks guys. a few more questionsÖ

How can I restart the sshd service?
I cannot find gdm in my X11 folder.

iskywalker: what do I need to replace myremote and myhost with?
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binary_1001010Commented:
are you using Redhat or ubuntu?  

to restart sshd in  redhat  :  service sshd restart


myremote is the linux server ip.
myhost is the ip of the PC where cygwin is running, i assum it is xp?
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tomanizerAuthor Commented:
Thanks binary.

The distribution is SUSE 10.0.
I tried "service ssh restart" but the service command is unknown.
Cygwin is running on XP.

I cannot find the gdm or the gdm directory. What does it stand for?
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binary_1001010Commented:
sorry man, i am not sure about suse.

have you try google?
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tomanizerAuthor Commented:
I could not figure out how to restart the service.
So I rebooted the server...
Now it works following Binary's suggestions.
Thank you.
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