How to fix 'Request error : authentication failed empJAgent.exe' eror in Oracle loading test?

I`m trying to make my first load adf test. I have choosen software from Oracle "Oracle Application testing suite". But after probably first good test everything that im trying to test receives an error response even empty scenario ( of course from open script).

I tried lots of combinations in settings in OpenScript and all of the requests in this app are passed. We can find errors only in Oracle Load tests app. I don't have any idea what should I do. Can You give me any advice?

Every request respons showing this eror:

Request error : authentication failed empJAgent.exe