Hello!

>> Please confirm - does you have the same versions of client library

and server?

>Yes, they are the same.

Hmm, can you please post here their exact versions?

And, to be sure, please check - is any gds32.dll in system path
(Windows\System32) that can be loaded before you run gbak.exe (for example,
you may run some application that use this old gds32.dll and can load it
before you use gbak.exe).

Old client lib (gds32.dll from FB1.0, IB6.0 and so on) cannot connect to
FB1.5 using local protocol.
I have seen gbak errors similar to your many times - and always it was
mismatch of versions of client and server.

So please check twice (just search all disks) - is any old gds32.dll there?
Eliminate them except the one (only the one client dll from FB1.5 should be
there) and try again.
Please post feedback here.

>> IF no, see my answer above and stop playing with gbak :)

>What do you mean????

Disregard it - it's just my bad English. :)

Sincerely yours,
Alexey Kovyazin
http://www.ibsurgeon.com