I was having some problems to connect to a Firebird database on my linux box. altough the same configuration has worked for my windows environment, clearly it was not the case for linux. it keep throwing the “GDS Exception 335544721”. after digging for a while, I discovered a way to make it work. I must say, I installed the JayBird for Mandriva for the .jar and the .so files. you can download it here.