[LAU] firewire expresscard issue

Hello, I bought an edirol fa-66 which doesn't work on my ACER 7720 laptop (freebob). I tried a few things (disable cpu frequency scaling, change priority with setpci, rtirq script...) without success. I have a Ricoh firewire controller, and I read it can be buggy with firewire audio cards. Therefore I bought an expresscard firewire... and I cannot manage to use it !! I'm aware it isn't really an audio issue, but if someone here know the answer (or maybe you have an idea where else I could have help ?)... It seems recognized as PCI device, but not as firewire. lspci -v gives : 02:00.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200(A) PCI Express-to-PCI Bridge (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=02, secondary=03, subordinate=03, sec-latency=0 Capabilities: [50] Power Management version 2 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/4 Enable- Capabilities: [80] Subsystem: Gammagraphx, Inc. Unknown device 0000 Capabilities: [90] Express PCI/PCI-X Bridge IRQ 0 I tried "modprobe pciehp pciehp_force=1", "modprobe pci_hotplug" but same thing... I tried to plug the card before boot (just a few seconds after turning the laptop on, it freezes if I plug it before...) and after. /var/log/syslog while I plus the card : Sep 4 12:04:29 felicien kernel: [ 229.518609] pciehp: Card present on Slot(0002_0000) Sep 4 12:04:29 felicien kernel: [ 229.545152] hub 1-0:1.0: over-current change on port 2 Sep 4 12:04:30 felicien kernel: [ 229.803697] pciehp: No bus number available for hot-added bridge 0000:02:00.0 Sep 4 12:04:30 felicien kernel: [ 229.803765] program_fw_provided_values: Could not get hotplug parameters Sep 4 12:04:30 felicien NetworkManager: <debug> [1220522670.621720] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/pci_104c_8231'). If you have an idea... thanks a lot !