iproute & htb

[Jc <jcb@niluge.net>]

i don't understand why i have this error :

tc qdisc add dev ppp0 root handle 1: htb default 26
RTNETLINK answers: Invalid argument


lsmod
Module                  Size  Used by    Not tainted
sch_cbq                11616   0  (autoclean)
cls_route               4088   0  (unused)
cls_tcindex             3896   0  (unused)
cls_u32                 4540   0  (unused)
sch_sfq                 3392   0  (unused)
sch_htb                18080   0  (autoclean) (unused)