I'm using Sandbox 2.5 (On Windows 7) and whenever I go to load any of my custom textures, it always says it fails to read the file location (every file is put in its correct spot as well). It's getting quite frustrating as I've used both ways, but I seem to still have the same problems.

That is my current "packages" file. I don't see how it fails to read it, everything is in its perfect directory. Please let me know if something went wrong with the coding on the file, I have some really neat textures I would like to add.
Thanks.