If you have followed the tutorial exactly, it should work. You probably made a little mistake when moving the logic to your character. There are really many things that may cause this, if you copy the RPCGraph nodes or interfaces in the wrong order for example. Without seeing your nodes it is quiet hard to guess what went wrong. If I had this issue I would compare the relevant nodes on my character with the ones on the Demo character and check for any differences.
We fixed the pickup problem and a several other Issues in a RC session, most of it related to Interface Events, if somebody else is taking this step, make sure all your events transfered correctly (I think Jack also notes this in the video).