BDE error 8458 in Delphi 5 connecting to Informix 7.23 via I-connect 7.23

Tried to make a connection to Informix db with BDE Administrator and got
following error:

Database Engine Error
Cannot Load IDAPI service library.
File: SQLINF32.DLL
Alias: INFORMIX1

I've got the same result in two WIN-95 machines. I-connect seems to work
fine.
Thank you for any ideas..
pat