hi there, i have problems installing the Network Simulator all-in-one on the Linux SuSe 6.3. the errors are as follows : .... checking for tk.tcl ... tkbox/lib/tk8.0 checking for X11 header files can�t find X includes octl-1.0a4 configuration failed ! Exiting. can anyone tell me how i can solve this problem ? thanks. rgds, kwang mien