[Zope] Is there any Firebird-Interbase user ?

Hi to all! With Z SQL Method I try to: insert into omreznaskupina (STEVOMREZJ,IMEOMREZNE) values ( <dtml-sqlvar stevomrezj type="string">, <dtml-sqlvar imeomrezne type="string"> ) I get no new data using Z Firebird DB while using Z Gadfly DB works fine. Thanks! Ivan