Login with SOAP ws

I’m taking the first steps in using the soap api.
At the moment I’m bound to use the v4_1 soap api, and I’m trying to use the login operation.
To that end I’ve created a simple SoapUI project, importing the wsdl from my SuiteCRM installation’s endpoint.

Yet I’m getting an error if I try to use the login operation with the administrative credentials (the very same username and password I use when I log into my SuiteCRM instance).
What am I doing wrong?

my mistake: according to the docs I had to use the md5 hash of the password instead of the password itself.

Issue solved.