Cannot dock with Kerbal Attachment System and KIS

[aayushpathak]

KSP Version : 1.1.2.1260

KAS Version : 0.5.9

KIS Version : 1.2.12

I just installed KAS and KIS, and to test it i placed a random rover with an empty fuel tank on the ground and then sent an engineer in another rover with tools (winches, wrenches, connector ports etc.) and a filled tank. I attached connector ports on both the modules and then used the "link" feature which linked them instantly with a pipe. But i wasn't able to transfer any fuel as the two ships were not docked.

Then I tried the winch, I grabbed the winch wire thingy and went up to a connector port. When i selected the "docked" option to plug in, the winch wire came off the back of the kerbal and said "you had nothing to plug in" but when I selected the "undocked" option, the thing attached but it still wasn't docked and I couldn't do any transfers. Why is this happening and how can i solve this?