> I have XP SP2 with Pentium 4 processor run FB 2.1.3, and my application
> run well on this. now I'am trying to upgrade FB engine to 2.5 RC2, but
> when connecting to the database, system raise an error "Invalid connection
> string, Invalid ESCAPE sequence".
> any idea what should i do ?.

This is a bug, see http://tracker.firebirdsql.org/browse/CORE-2929

Regards,
Vlad