i connected to a Server which is using SUSE Linux Enterprise Server 10 SP2 (x86_64). I have just installed xCrySDen on the Server. I want to open it with a graphic user interface when i use a ssh client( F-Secure ssh client ) to connect to the server. When i use F-Secure ssh client in Windows 7, login in the server, then start xCrySDen, it failed with the following text: Application initialization failed: no display name and no $DISPLAY environment variable Error in startup script: can't read "xcrys(platform)": no such variable while executing "if { $xcrys(platform) == "windows" } { # testing ... rename exec _tcl_exec proc exec {args} { global env # first try a normal exec..." (file "/home/users/luttangfl/software/XCrySDen-1.5.21-bin-semishared/Tcl/cygwin.tcl" line 19) invoked from within "source $system(TOPDIR)/Tcl/cygwin.tcl" (file "/home/users/luttangfl/software/XCrySDen-1.5.21-bin-semishared/Tcl/xcInit.tcl" line 433) then, i tried the command xlogo, it said: Error: Can't open display: When i use Putty( another ssh client) in Windows 7, enable the X11 forwarding in Putty, it still couldn't open the graphic user interface. But when i used Ubuntu10.04, open the terminal, and use the following command: <div style="margin-left: 40px;">ssh -l abc -p 222 111.111.111.111 -X </div>and then after i login into the server and start xCrySDen, it works, i can see the application's graphic user interface. i want it works correctly when the clients' OS is Windows. Can you help me? Thx a lot !!!! >>>>>>>>【this is an email sent by tiankong】