Hello, I am trying to build NS on a Linux machine running RedHat 5.2. The problem I am having is that I can not seem to be able to build the Tk/Tcl package. I keep getting an error when saying tk.h can not find Xlib.h. What can I do to fix this? Thanks. Join 18 million Eudora users by signing up for a free Eudora Web-Mail account at http://www.eudoramail.com