Since few days, my project didn’t link to perforce on my computer. I have other project on the same workspace and their have no problem with them. I tried to set up an other workspace but it didn’t work too.
But, if I work at school, on the same worspace (I map on external hardrive), it’s work fines. No other people of my team seem to have problem with this.
From your command prompt, type the command:
p4 info
and if that doesn’t help you figure out your issue, post the results of that command and I’ll assist further. 
C:\Program Files\Autodesk\Composite2014\program>p
Perforce client error:
Connect to server failed; check $P4PORT.
TCP connect to perforce.centrenad.com:166
connect: 206.167.213.5:1666: WSAEACCES
C:\Program Files\Autodesk\Composite2014\program>
Okay that’s telling me that your machine is more than likely not able to reach the specified server. Can you successfully ping the server from your local machine?
Are you certain they’re using 1666 as the port?
Actually more importantly, can you telnet to the server and it’s associated port? If done correctly, the below example should return a blank screen if you connect.
Example:
c:\telnet your_server_address 1666
I found the problem by looking on another working project. My server name had mistake. I don’t know why it has been change since few days. Thanks for your help.