ERROR: "Proxy Authentication Required" Blink SIP client

After having registered and downloaded the Blink SIP client as specified in the guide, even the “test call” fails an an error code appear in red “Proxy Authentication Required”.
What is this all about?

This is coming from SIP2SIP as it seems you entered the forwarding credentials incorrectly.

I just created an account and started using it, if i try to change the proxy settings the program doesn’t allow me to do it (grayed out area)…however we can consider this problem sorted as Nick forwarded to me the link to download a different SIP client (X-Lite), and that one seems to be working okay, i will let you know if i need more help, thanks.

Sounds good and thanks for the feedback