Hello there,
As I said in one of my posts on the forum, I had to modify the names of the fields used in the database when trying to use Firebird 2.1 instead of HSQLDB. This was due to the fact that the following are reserved words in Firebird (and maybe in other databases as well) : "Type", "Password", "Version", "Value".
URL of the forum post for reference:
https://sourceforge.net/forum/forum.php?thread_id=2504002&forum_id=552477