Ubuntu Installation :: Package Manager Won't Update Source List Pmcenery-ppa-lucid?

I recently got an iPhone 3g and have been trying to upload music onto my device with Rhythmbox because my computer exclusively runs Ubuntu (10.04 LTS, Lucid Lynx). Rhythmbox would show files that were dragged and dropped as being on the iPhone, and they appeared in the iPhone's folders, but they weren't recognized in the iPod player. I followed a variety of forum threads to try to fix the problem, but ended up creating a whole new set of problems with my package manager.

I get this error message before package manager opens: E: Type 'n' is not known on line 2 in source list /etc/apt/sources.list.d/pmcenery-ppa-lucid.list E: The list of sources could not be read. Go to the repository dialog to correct the problem. E: _cache->open() failed, please report.

And this message after I close the first error message window and the package manager opens: An unresolvable problem occurred while initializing the package information. report this bug against the 'update-manager' package and include the following error message:

'E:Type 'n' is not known on line 2 in source list /etc/apt/sources.list.d/pmcenery-ppa-lucid.list, E:The list of sources could not be read.' Does anyone have any recommendations on how to fix this? If it isn't already apparent, I am very inexperienced working with ubuntu, so the more detailed the response, the better.