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I work with Lazarus 0.9.30 using ZeosLib 7 and Firebird 2.5.
ZConection does not suport protocol for firebird 2.5. Can I find and download this protocol from somewhere.

I tryed install Zeos 7 trunk rev834 but when I try compile ZeosComponents
compiler report error :

C:\lazarus\components\ZeosDBconnection\ZeosTrunk834\src\component\ZSqlStrings.pas(292,25) Error: identifier idents no member "GetCharacterState"

What I doing wrong?

If you download the lastest trunk rev you found also the support for Firebird 2.5

OK,
but why I can not compile this trunk?