Does this only happen when you get a certain amount of users on the Terminal server? If so it sounds as though it is a MaxWorkItem shortage problem on your DC. You can also get this if you are using roaming profiles and your profile server has a MaxWorkItem shortage. Chris -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of liangliang@xxxxxxxxxxxxxxxx Sent: Friday, April 13, 2007 9:14 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Unable to Logon The terminal server Commonly after we connect to a terminal server installed with Win2K3 Server successfully, then the server should display a Form named "Logon to Windows", where we can write down our ID and password. But I encounter a problem that after i connected to a TS successfully, all i could get is a gray screen without the Form. Only i can do when i encounter this is restart the server. Is there any other solution i can take to resolve the problem?