Pyramide

Folowing the toturial on:
http://docs.geoserver.org/2.0.x/en/user/tutorials/imagepyramid/imagepyramid.html

I cant get to work rhe imagePyramide on the curent nightly buid. Date 16.4.2010.

I always get the error:
Could not list layers for this store, an error occurred retrieving them: This plugin accepts only File, URL and String pointing to a file

In tuturialit says:
When clicking save the store will look into the directory, recognize a gdal_retile generated structure and perform some background operations:

• move all tiff files in the root to a newly create directory 0
• create an image mosaic in all sub-directories (shapefile index plus property file)
• create the root property file describing the whole pyramid structure
  But its not working. Plese help i need to make a coverage piramide on the geoserver engine.