Image uploading issue with Carrierwave and Minimagick (Ruby on rails) - ruby-on-rails

Question

I am using Carrierwave to upload images and that works fine but I am now trying to use Minimagick to process these uploaded images.
What is going on?
The images still upload as well as their thumb version, however both images are exactly the same size.
Here is the uploader code:
class FileUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
# Choose what kind of storage to use for this uploader:
storage :file
# Override the directory where uploaded files will be stored.
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
# Create different versions of your uploaded files:
version :thumb do
process :resize_to_fit => [100, 100]
end
# Add a white list of extensions which are allowed to be uploaded.
def extension_white_list
%w(jpg jpeg gif png)
end
end
And here is how I am calling it:
<%= image_tag example.my_file.url(:thumb).to_s %>
I dont think it is anything to do with the way I am calling it because the two files created by all this are the same, so sound slike its to do with processing it on upload.
Here is the folder created for each object:
Image
--- Fixed ---
The issue was ImageMagick. It was not properly configured on my machine so that means no gem that deals with image processing (Paperclip, Minimagick or Dragonfly) could complete any image manipulation.