ERROR: <Fault 602:

That error means that you have supplied wrong email or password while submitting the session. Make sure that those are correct and that you are using the latest uploader build as the username / password thing has changed since the previous version. Download the latest from http://www.renderfarm.fi/blender 

If the problem prevails, then don't feel shy to post more questions.

 I checked my username and password and these were correct. I have also latest renderfarm.fi blender.
Still the same result.

redstone.xmlrpc.XmlRpcFault: getSessionKey: no user with the given password

I found this error in the logs. Are you sure that you are using your EMAIL, not user name? The email is the one you used to register to Renderfarm.fi 

 I tried once with username to see what happens. All other attemts were with e-mail.

edit: Now I tried to change my password from given one to my own on the profile web page.
Now it looks like the job is submitted.

I just saw that your session has been received here. We are maintaning the service today, so the reason why you probably experienced couple of difficulties.

I experienced some similar problems. I am quite sure I entered the correct email and pwd but got the 602 Error. Then I changed my pwd from the webpage (still using the old pwd) and then it worked.

Carsten