[Map✓] Custom Textures showing up as white in game (HGSS)

I have been testing out some custom textures in HGSS using Pokemon DS Map Studio and SDSME but every time I make a map and import it into the game, when I start it up, all the textures are white. I don't know how to fix this and I have followed all the tutorial steps as closely as possible... Any ideas on how to fix this? Please see pictures attached below! Thanks for the help!