1) It is a business network. As for my computer, it is NOT in the same network BUT it is bridged. Server is on 128.1.x.x and mine is on 192.168.x.x
We have 5 different network at my work place (i'm the IT here) they are all bridged together and can communicate fine (i can ping the server no problem wherever i am and i have a TS session running on it no problem). Also, it worked before, so i doubt the fact that it is not exactly in the same network would be the root of the problem, as some users are in the same network as me and work perfectly
2)Tryied the hostname and the ip, doesn't work