Hi Subin,
Could you please let me know the programming language that you are using? Also, please confirm if you are using one of our
client libraries. Steps to enable logging would be specific to the language that you are using. For Java, you could follow the steps listed in
this document.
If you navigate to the 'Source' in the respective client library (linked above), you should be able to find the instructions for enabling logging for that library. If you have difficulty finding that, please write back with the details.
Thanks,
Sreelakshmi, AdWords API Team