ACARD AEC6710D SCSI adapter and Vuescan problem

Hi all!
I have the old film-scanner Acer/Benq ScanWit 2720S with the ACARD AEC6710D SCSI-to-PCI adapter (chipset ATP870IU-C). The scanner works fine on the PC with WinXP but not with OpenSUSE 11.4 (kernel: 2.6.37.6.-0.9 x86_64). I'm trying to use VueScan (trial version, 9.0.66) for scanning.
VueScan detect the scanner but when I click 'Preview' or 'Scan' button the program send some commands to the scanner (his status is 'Busy ...') and no result appear :(
When the VueScan is terminated the scanner cannot be detected by VueScan again (I need to restart PC).

The VueScan log file contains many lines like:
1 0 INQUIRY 12 0 0 0 24 0 80000004 0xxx

I know that the atp870u driver has many problem and it is better to buy any other adapter like Adaptec 29xx.

But maybe I can help with the atp870u driver debugging :) I think my scanner doesn't works because atp870u has some bugs.

There is some output about my scsi device:
lsscsi

[1:0:0:0]    cd/dvd  Optiarc  DVD RW AD-7170A  1.02  /dev/sr0
[3:0:0:0]    disk    ATA      ST3250310AS      3.AA  /dev/sda
[5:0:0:0]    disk    Generic  USB SD Reader    1.00  /dev/sdb
[5:0:0:1]    disk    Generic  USB CF Reader    1.01  /dev/sdc
[5:0:0:2]    disk    Generic  USB SM Reader    1.02  /dev/sdd
[5:0:0:3]    disk    Generic  USB MS Reader    1.03  /dev/sde
[6:0:6:0]    scanner Color    FilmScanner____1 0117  -

ls -lsh /dev/sg*

0 crw-rw----  1 root  cdrom 21, 0 Dec 14 17:36 /dev/sg0
0 crw-rw----  1 root  disk  21, 1 Dec 14 17:36 /dev/sg1
0 crw-rw----  1 root  disk  21, 2 Dec 14 17:36 /dev/sg2
0 crw-rw----  1 root  disk  21, 3 Dec 14 17:36 /dev/sg3
0 crw-rw----  1 root  disk  21, 4 Dec 14 17:36 /dev/sg4
0 crw-rw----  1 root  disk  21, 5 Dec 14 17:36 /dev/sg5

0 crwxrwxrwx+ 1 username lp 21, 6 dec 14 17:36 /dev/sg6

cat /proc/scsi/scsi
Attached devices:
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: Optiarc Model: DVD RW AD-7170A Rev: 1.02
Type: CD-ROM ANSI SCSI revision: 05
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: ST3250310AS Rev: 3.AA
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi5 Channel: 00 Id: 00 Lun: 00
Vendor: Generic Model: USB SD Reader Rev: 1.00
Type: Direct-Access ANSI SCSI revision: 00
Host: scsi5 Channel: 00 Id: 00 Lun: 01
Vendor: Generic Model: USB CF Reader Rev: 1.01
Type: Direct-Access ANSI SCSI revision: 00
Host: scsi5 Channel: 00 Id: 00 Lun: 02
Vendor: Generic Model: USB SM Reader Rev: 1.02
Type: Direct-Access ANSI SCSI revision: 00
Host: scsi5 Channel: 00 Id: 00 Lun: 03
Vendor: Generic Model: USB MS Reader Rev: 1.03
Type: Direct-Access ANSI SCSI revision: 00
Host: scsi6 Channel: 00 Id: 06 Lun: 00
Vendor: Color Model: FilmScanner____1 Rev: 0117
Type: Scanner ANSI SCSI revision: 02