Hello, I have a problem, I want to configure the htb qdisc, my 
configuration scripts loke like:

tc qdisc add dev eth0 root handle 1: htb

tc class add dev eth0 parent 1: classid 1:1 htb rate 6mbit burst 15k
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 5mbit burst 15k
tc class add dev eth0 parent 1:1 classid 1:20 htb rate 3mbit burst 15k
tc class add dev eth0 parent 1:1 classid 1:30 htb rate 1kbit burst 15k

tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev eth0 parent 1:20 handle 20: sfq perturb 10
tc qdisc add dev eth0 parent 1:30 handle 30: sfq perturb 10

tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip sport 80 
0xffff flowid 1:10
tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip sport 25 
0xffff flowid 1:20

When I execute my script I get:

RTNETLINK answers: Invalid argument
Error: Qdisc "htb" is classless.
Error: Qdisc "htb" is classless.
Error: Qdisc "htb" is classless.
Error: Qdisc "htb" is classless.
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument

What is wrong?.

Thanks in advance.

Ana.