GetProcess Error "Couldn't connect to remote machine"

hi all, having abit of a problem getting processors from a remote pc, the code works for my local machine but soon as I add in the remote PC's IP an exception is thrown "Couldn't connect to remote machine"
 
code is as follows
 

private void btnGetProcess_Click(object sender, EventArgs e)
        {
            Process[] processlist = Process.GetProcesses("machine ip");
            foreach (Process p in processlist)
            {
                listBox1.Items.Add(p.ProcessName);
            }
        }

help would be appreciated
thanks alot
wes