Thank you for the answer.

The version with system DSN works. Now I have a base for my experiments.

I found some hints in the net. Some people point out, that the string of a
DSN less connection must not longer than 32 characters for some odbc
implemetation. Other problems may be the right escaping of quotes or
slashes.
I will try the perl or tcl version and go back to ruby than.

--
Rasmus