RB433ah with two R2n cards and routeros 4.4

/interface wireless shows the two cards:
Flags: X - disabled, R - running
0 name="wlan1" mtu=1500 mac-address=00:0B:6B:0A:80:F7 arp=enabled interface-type=Atheros 11N mode=ap-bridge ssid="Building 2 East"
frequency=2427 band=2.4ghz-b/g scan-list=default wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=wpa-wifi compression=no

1 name="wlan2" mtu=1500 mac-address=00:0C:42:51:B2:E6 arp=enabled interface-type=Atheros 11N mode=ap-bridge ssid="Building 2 Center"
frequency=2442 band=2.4ghz-b/g scan-list=default wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=wpa-wifi compression=no

/interface bridge add

Then add the two wlan interfaces to the bridge..

/interface bridge port> print
Flags: X - disabled, I - inactive, D - dynamic
# INTERFACE BRIDGE PRIORITY PATH-COST HORIZON
0 ether1 bridge1 0x80 10 none
1 wlan1 bridge1 0x80 10 none
2 I wlan2 bridge1 0x80 10 none

wlan1 works, wlan2 does not.

/interface wireless registration-table> print
# INTERFACE RADIO-NAME MAC-ADDRESS AP SIGNAL-STRENGTH TX-RATE UPTIME
0 wlan1 70:1A:04:3B:C5:F8 no -37dBm@54Mbps 12Mbps 35s

clues?

"I" means inactive. It could happens if nobody is registered in this interface

Can I resurrect this topic? I'm having the same trouble since I don't know when.
1 bridge, 1 ether and 2 wlans. wlan1 shows as available, with its SSID, but when a device tries to link, it keeps on trying and can't connect. It doesn't put any info at the logs ("wireless" on), but it does when I try to link wlan2 (and it works perfectly), so I'm clueless. I'm sure that they both have got exactly the same options (excluding name and channel).

The only one difference with Mystique, is that my cards are Atheros AR5006X. The only thing I can think about is that one of these cards is damaged.
RouterOS updated to v4.5 a few days ago. (wlan1 was already failing before)

Thanks beforehand.

the interface is inactive until it is successful for a wireless connection.