[LARTC] problems with u32 fiter

[listas@pablodanielrey.com.ar]

hello to all
i'm trying to set a filter but doesn't want to work.
i've set ut the qdiscs and the classes like this :

tc qdisc add dev ppp0 root handle 1: htb default 20
tc class add dev ppp0 parent 1: classid 1:1 htb rate 120kbit
tc class add dev ppp0 parent 1:1 classid 1:20 htb rate 30kbit ceil 120kbit
tc class add dev ppp0 parent 1:1 classid 1:21 htb rate 30kbit ceil 120kbit
tc class add dev ppp0 parent 1:1 classid 1:22 htb rate 30kbit ceil 120kbit
tc class add dev ppp0 parent 1:1 classid 1:23 htb rate 30kbit ceil 120kbit
tc qdisc add dev ppp0 parent 1:20 handle 20: prio
tc qdisc add dev ppp0 parent 1:21 handle 21: prio
tc qdisc add dev ppp0 parent 1:22 handle 22: prio
tc qdisc add dev ppp0 parent 1:23 handle 23: prio

but when i try to set up the filters :

tc filter add dev ppp0 parent 1:0 prio 1 u32 match ip src 192.168.0.2 flowid 1:23
tc filter add dev ppp0 parent 1:0 prio 1 u32 match ip src 192.168.2.2 flowid 1:22
tc filter add dev ppp0 parent 1:0 prio 1 u32 match ip src 192.168.0.1 flowid 1:21

says :

RTNETLINK answers: Invalid argument

---------------------------------------------------------------------

my system :

router:~# tc qdisc show dev ppp0
qdisc prio 23: bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
qdisc prio 22: bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
qdisc prio 21: bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
qdisc prio 20: bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
qdisc htb 1: r2q 10 default 20 direct_packets_stat 0

router:~# tc class show dev ppp0
class prio 23:1 parent 23: [UNKNOWN]
class prio 23:2 parent 23: [UNKNOWN]
class prio 23:3 parent 23: [UNKNOWN]
class prio 22:1 parent 22: [UNKNOWN]
class prio 22:2 parent 22: [UNKNOWN]
class prio 22:3 parent 22: [UNKNOWN]
class prio 21:1 parent 21: [UNKNOWN]
class prio 21:2 parent 21: [UNKNOWN]
class prio 21:3 parent 21: [UNKNOWN]
class prio 20:1 parent 20: [UNKNOWN]
class prio 20:2 parent 20: [UNKNOWN]
class prio 20:3 parent 20: [UNKNOWN]
class htb 1:22 parent 1:1 leaf 22: prio 0 rate 30Kbit ceil 120Kbit burst 1637b cburst 1752b
class htb 1:1 root rate 120Kbit ceil 120Kbit burst 1752b cburst 1752b
class htb 1:23 parent 1:1 leaf 23: prio 0 rate 30Kbit ceil 120Kbit burst 1637b cburst 1752b
class htb 1:20 parent 1:1 leaf 20: prio 0 rate 30Kbit ceil 120Kbit burst 1637b cburst 1752b
class htb 1:21 parent 1:1 leaf 21: prio 0 rate 30Kbit ceil 120Kbit burst 1637b cburst 1752b
router:~#

i'm stuck. anybody knows what's going on.
thank's 
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