Network Error : Remote side connection closed

Hi all,
This may be not related to this thread but I need help on this ASAP.
I am trying to connect remote desktop of machine through web browser say firefox.
http://ip-of-my-host:5801/
my host has Suse11 linux
I have enabled RDP of the machines.
But when I do http://ip-of-my-host:5801/
I get Network error.

Any pointer will be appreciated.
Thanks in advance