Hi, Im new in application manager. I have 4 probe. i try to add centos linux monitor. When i try to my probe, there error message  "Prompt not matching the target server. Kindly check whether the given Command Prompt is correct."

But when i try to add from the other 3 probe, the message error is different. The message is "Authentication failed. Kindly verify the username and password provided". Also check whether the given Command Prompt is correct". May you help me why the message is differet please?