Issue with RESTful WebService Authorization

Hello, we are using Peoplesoft delivered QAS WebService (QAS_EXECUTEQRY_REST_GET). I was able to get it working fine with out authentication enabled. I have 5 webservices.

Now i want to enable authentication and it won't work correctly for all. I created an PermList, Role and Id gave it necessary permissions. I also gave access to that permlist via Service Operation Security

Using postman, i gave basic authentication and it encrypted password in base64.

2 of my web services with authentication are working and other 3 are not working. Not sure why?

Any pointers or any specific documents