Can't process the output of the gulp-compass task.

I'm trying to get the `gulp-compass` version `1.0.1` into my `gulp` build stream but am having issues working with the output of the compass compiler.

Here is the gulp task I've got which should:
1. Find all `.scss` files.
2. Process with `compass`
3. Run `autoprefixer` over the resulting css
4. Write to .css file
5. Trigger `livereload`
6. Output the .css `filesize` to console.

``` js
gulp.task('styles', function() {
gulp
.src('assets/scss/**.scss')
.pipe( tasks.compass( { config_file: './config.rb' } ) )
.pipe( tasks.autoprefixer( 'last 2 versions', 'ie 8' ) )
.pipe( gulp.dest('assets/css') )
.pipe( tasks.livereload(server) )
.pipe( tasks.filesize() );
});
```

The issue I'm experiencing is that after `.pipe( tasks.compass( { opts } ) )` has run, `autoprefixer` does not trigger, nor does the `livereload` or `filesize` tasks.
The compass output does however get written to the `.css` file as desired.

Note: Livereload by itself is working, coffeescripts are successfully compiled and the livereload is triggered so the module in itself is working.

Any ideas would be much appreciated.

Reproduce the `styles` gulp task with `gulp-compass` 1.0.1 and `config.rb`, checking whether the stream reaches `autoprefixer`, `livereload`, and `filesize` after Compass writes the CSS. Inspect the gulp-compass transform entry point and stream completion behavior; done means all downstream tasks run while the CSS output remains correct.

Written by the indexing model from the issue text.