Castle Bec Pro + castle link

[Knez]

I connect castle Bec pro with small wire "red and black only" than i connect it to castle link than connect lipos to supplies the power...and nothing on my pc screen. When i connect esc to castle link it works as it should..
All i wanna do is set the bec pro to 6V.

I got bec pro soldered to esc. When i spoke with castle, "the man" on the phone sad i can connect it to castle link even if i got it soldered on esc. Just use the power from lipos..

Am i doing anything wrong here?