openwrt里nwan的指定出口无效，大家帮我看看是怎么回事？

yy915cn

系统日志一开始就有错误：
0 |4 \' ^$ ~/ X; j' iuser.info sysinit: iptables v1.4.6: can't initialize iptables table `mangle': iptables who? (do you need to insmod?)
) l) O5 B" c* O& R5 L  d) Iuser.info sysinit: Perhaps iptables or your kernel needs to be upgraded.

规则如下：
( z2 J4 S9 ]3 J4 S6 t8 buser.info sysinit: line 11 dst=www.ip138.com
user.info sysinit: add iptables:iptables -t mangle -A ASSIGNOUT -p all -d www.ip138.com -j MARK --set-mark 1010
4 L% b" N% H/ K. quser.info sysinit: rule start...