Gamecube controller to N64 adapter problem.

Hello everyone,
I have a weird problem with the Gamecube to N64 controller adapter.
When I turn the N64 on, the controller starts vibrating like crazy and keeps at it until I turned the N64 off.
It also doesn't work when I press a button, so it also doesn't work at all.
I have a video which shows the problem.
So what is this problem and how to get it fixed?
Thanks in advance.
I have a weird problem with the Gamecube to N64 controller adapter.
When I turn the N64 on, the controller starts vibrating like crazy and keeps at it until I turned the N64 off.
It also doesn't work when I press a button, so it also doesn't work at all.
I have a video which shows the problem.
So what is this problem and how to get it fixed?
Thanks in advance.