Paul,

> I have to create persistent fields in the SQLDataSet as well (at
> least when using Firebird--I never had any problem with the
> commercial version of Local Interbase). Anyway, after creating
> persistent fields for SQLDataSet, I had to manually set the pfInKey
> for the key fields. Now everything works properly for both Firebird
> and Interbase.

I have found several strange discrepancies in how dbX queries Firebird
metadata (try SetSchemaInfo - or OpenSchema, I never remember). It is
possible that the culprit is not in the difference between InterBase and
Firebird, but in the dialect. Did you change SQL dialect when you
changed server?
Ciao
--
____
_/\/ando