I have error as follow: <-- cc -O2 -Wall -Wunused -I/usr/src/linux-2.4.26/include -Iinclude/ - DNETFILTER_VERSION=\"1.2.6a\" -fPIC -o extensions/libipt_ECN_sh.o -c extensions/libipt_ECN.c extensions/libipt_ECN.c: In function `parse': extensions/libipt_ECN.c:51: `IPT_ECN_OP_REMOVE' undeclared (first use in this function) extensions/libipt_ECN.c:51: (Each undeclared identifier is reported only once extensions/libipt_ECN.c:51: for each function it appears in.) extensions/libipt_ECN.c: In function `print': extensions/libipt_ECN.c:82: `IPT_ECN_OP_REMOVE' undeclared (first use in this function) extensions/libipt_ECN.c: In function `save': extensions/libipt_ECN.c:99: `IPT_ECN_OP_REMOVE' undeclared (first use in this function) extensions/libipt_ECN.c:103: warning: deprecated use of label at end of compound statement <-- could you help me, where I got wrong... -- Robert