Hi,
It looks like you are using a very old version of H2 on the client
side, but the newest version on the server side. This was changed in
version 1.0.65 from January this year as far as I know, so it looks
like you use version 1.0.64 or older on the client side.
Of course it would be better if older clients can connect to newer
servers and vice versa. This feature is now implemented, but was not
implemented in older versions however. So I am sorry, you will need to
upgrade in this case.
Regards,
Thomas