I am running Firebird 2.0.1 on a Win2003 server and all is working
fine. I have copied my database from the Win2003 server onto a Windows
Vista (64bit) machine with Firebird 2.1.1 (for Win64) installed. I
have the same FreeUDFLib.dll file copied into the \UDF folder of each
Firebird installation.

On my Vista machine all the UDFs are listed in the database and show
up in the Sql editor of IBExpert. When I try to use one of the UDF's
though it errors out with:

Invalid request BLR at offset 63.
function F_LOWERCASE is not defined
module name or entrypoint could not be found

Using ISQL I get the following results:
SQL> select
RDB$FUNCTION_NAME,RDB$FUNCTION_TYPE,RDB$MODULE_NAME,RDB$ENTRYPOINT
from RDB$FUNCTIONS;

Returns data for all 81 Functions like:
F_LOWERCASE 0 FreeUDFLib.dll IB_LowerCase

My firebird.conf file contains the default value:
#UdfAccess = Restrict UDF

Any ideas how I can get my Vista installation to use FreeUDFLib?
Thanks for any help,
Eric