Slot 1 contact problem (acekard 2.1)

So my AK2.1 doesn't seem to be working in my ds lite anymore but when I place it in my brother's ds original it works so it's probably a contact issue right? I tried paper but that doesn't seem to be working. Looking inside my ds I see this

Spoiler

See that funny looking pin? I think that might be the cause of it but all my regular games work fine so I don't know what to think.
Does anybody have an idea?

You're right one of the contact is bent.So I would say bring it to a shop to repair.You're Slot 1 is broken.