MinecraftForge 1.8 Imports Not Working

I have recently started modding in Minecraft 1.8, with Eclipse. I created a test mod, and it worked perfectly. Then I decided to start a new mod from scratch.

Almost immediately, I got an error by my imports.

I tried pressing Ctrl+Shift+O, to organize my imports, and it just deleted them, because they couldn't be resolved. I tried going back to my previous project, and the imports weren't working there either.

After some playing around, I realized that other imports were working.

Only net.minecraftforge imports weren't working.

I am extremely confused as to why this is happening. If you need me to upload my code, I will gladly do so. I greatly appreciate your help in advance. Thank you.