Changing Materials into Textures

Hi guys!
I am extremely new to this, as in I’ve only been using UE4 for about a week. I’m trying to build my first video game, and as a result I’m really out of my depth. I’ve recently bought a discounted material package of different types of woods and stones. However, I’m having trouble actually utilizing the materials in my level. Whenever I try and select the material from the drop down screen, it turns my block into the generic material that you start off with. What is more, in the content folder it also changes the image of the wood into the image of the generic material. I’m probably doing something really stupid and not realizing it. Can anyone help me figure this out?

Thank you so so much. Hope you guys are having a good week!
-L

open your material editior and see if everything (all the Pins) are connected to the end result Panel. I had that issue once and just needed to reconnect it