Platform: Windows 2008 Server R2

I have Firebird 64 bit installed from the file:

Firebird-2.5.2.26540_0_x64.exe

The config is  "Super Classic".

I examine fb_inet_server.exe in Windows Task Manager and see no "*32" beside the "Image Name" so I know it is running as a 64 bit process.

I have made a Delphi XE3 .exe that connects to Firebird.  I examine the Delphi .exe in Task Manager, and again, see no *32 beside it, so I know it is running as a 64 bit process.

When I try to connect to FB using the 854KB 64b fbclient at:

C:\Program Files\Firebird\Firebird_2_5\bin\fbclient.dll

I get the error message "unable to load..."

But when I load the 540KB 32bit fbclient.dll at

C:\Program Files\Firebird\Firebird_2_5\WOW64\fbclient.dll

it loads normally.

What am I missing here that is preventing the 64b fbclient.dll from loading?

Thanks in advance for any help you can provide.