Try doing the same thing with App World:
- go to Options->Advanced Options->Applications
- delete BlackBerry App World from the Applications list
- restart your device
- reinstall App World by visiting the following site:
Just to make sure you have the latest. Then delete White Noise, restart, and try downloading again.
I just pulled this information from the blackberry forums. So, if that doesn't work then I would suggest contact App World support at http://na.blackberry.com/eng/support/bl ... pworld.jsp