Connect an electric guitar pickup to PC

Hello,

I would like to connect my guitar pickup directly to my PC, is it possible?

I've wired an electric guitar pickup to a cable, which plugs directly to my sound card (where a microphone ought to be plugged):

Sound Card -> Cable -> Electric Guitar Pickup.

But it does not work properly. My PC almost does not receive any data - you can only notice it, when you strongly tap a massive iron on the pickup magnets (such as scissors).

It is important to add, that when I plug a standard electric guitar to my sound card (with a similar cable which I am now using), it works perfectly.

Please, Could anyone tell me what am I doing wrong?

Thank you so much in advance.