Hi All,

I think the problem is that Firebird 1.5.1 has a bug.
It does not allow several inserts during a short time.
I've found several posts on this on the Internet.
One person said that the 1.5.2 should solve the problem.

So, now I updated to 1.5.2 and also removed some of the inserts that
are unnecessary.
Hope this will solve it.

Thanks everyone for all your posts suggestions.

// SvenJ