Hi, I have succsefully installed ns-2.1b7 in RedHat 6.2. But when I run ns,there is a problem. ns: error in loading shared libraries: libtk8.3.so: cannot open shared object file: No such file or directory thank you for any hint. Deyun Gao --http://www.eyou.com --�ȶ��ɿ�����ѵ������� �����ʼ� �ƶ���ǩ ��������...����δ��