unable to connect to host

[raffael]

Hi guys,
i've got a problem while connecting from my winXP to my fedora core 5 
pc. Pinging works without any problems but when i want to connect to the 
server the message "unable to connect to host: der host war bei einem 
socketvorgang nicht erreichbar. (10065)" appears.
In englisch the last part of the sentence should mean something like 
"the host wasn't reachable while the socketprocess"

please help me.

yours sincerely
raffael