Milkdrop + preset + linein = problem?

[BigDaD]

Hi everybody,

I am trying to use a source from line-in on my computer to "visualize it" with milkdrop.
I plug the source in the line-in of my computer, i select source "linein://" from Open URL and it work correctly. i can see the equalizer follow the music; BUT the problem is milkdrop; not all preset work correctly with the line in. many effect simply stay black in the monitor, but many other work.

why?

i test it on 2 pc (running windowsxp) and winamp make the same problem.

there is a way to use all mildrop preset with the line in?
i search this problem in internet and i didn't found anything....

thanks for the answer

bye
(sorry if u think that my english is not good...)