Can't even launch SilverFast Ai 6.6r2

[Guntis]

Hi,
I didn't need scanner for a while, and today after updating to 10.5.5 I had to scan one page, but... I cannot launch SilverFast Ai 6.6.r2 - I just go round and round the Universal Launcher - I launch the launcher, press SilverFast (Canon SDK) (vers. 6.6.0r2) button, this screen disappears and appears again... That's all. If I press button to the reight, the same thing happens. Where's problem?

My system:
Apple MacBook Pro 17", 2.33 GHz Intel Core 2 Duo with 667MHz frontside bus, BootROM: MBP21.00A5.B08.
2 GB PC2-5300 (667 MHz) DDR2 SDRAM,
ATI Radeon X1600 PCIe - 256 MB GDDR3 SDRAM,
LCD native screen resolution: 1680 x 1050,
320 GB WD Scorpio (WDC WD3200BEVT-11ZCT0) Serial-ATA HDD (152 GB free),
MATSHITADVD-R UJ-85J Double-Layer SuperDrive,
AirPort Extreme (0x168C, 0x87), Bluetooth 2.0+EDR,
Mac OS X 10.5.5 with all the latest iTunes, QuickTime Pro and security updates.

Here's Console log:
08.9.20 00:06:59 com.apple.launchd[120] ([0x0-0xd00d0].com.lasersoft.sfapp[1439]) Exited: Terminated
08.9.20 00:09:25 com.apple.launchd[120] ([0x0-0xdf0df].com.lasersoft.sfapp[1523]) Exited: Terminated
08.9.20 00:09:26 com.apple.launchd[120] ([0x0-0xe00e0].com.lasersoft.sfapp[1524]) Exited: Terminated

[LSI_Ketelhohn]

It seems like there is some kind of problem with the access rights.
Have you tried repairing theses with the Mac Disk Utility?

kind regards
Arne Ketelhohn.

[Guntis]

No, I ran Disk Utility, but it didn't find anything. Everything's OK.

[LSI_Luebker]

Dear Guntis,

very strange behavior, please try deleting the "preferece files" to see if this cures the condition.
If this does not help please contact our Support via the Support Assistant.

best regards,

Thomas Lübker,
LaserSoft Imaging AG

[Guntis]

It doesn't help. I already deal with the LSI Testing Center. Thank you for taking time dealing with my problem.

[LSI_Luebker]

Dear Guntis,

sorry for your trouble with SilverFast.
As this is not a general problem you can only sort it out with our support and testing department by providing them all the information they need.

best reagrds,

Thomas Lübker
LaserSoft Imaging AG