VLAN and bridge on same computer

I am trying to configure a Linux bridge to bridge between multiple vlans.

The computer is runing Fedora Core 2 with the latest bridge-utils from sf.net.

The configuration:

vconfig add eth1 2
vconfig add eth1 3
vconfig add eth1 4
vconfig set_flag eth1.2 1 1
vconfig set_flag eth1.3 1 1
vconfig set_flag eth1.4 1 1

brctl addbr br0
brctl addif br0 eth1.2
brctl addif br0 eth0
ip link set br0 up

This works fine, but when I try to add another vlan like this:

brctl addif br0 eth1.3

I get this error:

can't add eth1.3 to bridge br0: File exists

As far as I understand the documentation this should work.

Regards
Morten Isaksen
http://www.aub.dk/~misak