Hi all, After 2-days investigation I could find the root cause. I used Oracle Instant Client lite 10.2.5 which contains only binaries. Then I tried Oracle Instant Client - SDK, which contains only lib.
I found I need to merge both to get my code working, I used the SDK as main client, created a bin directory into it then placed the lite client into it...it works !
Thanks for your gentle replies!
Abed.