> I have tested it with 8.1.4 (I suspect that is 8.1 sp4), seems to work
> without any problem. I have already downloaded 8.1.5, so I will check it
> tomorrow.

I think I have an idea when and why it happens. How did you deploy driver?
Is it part of some EAR? Unzipped JAR? Where did you put your driver?

Thanks!
Roman