when rendering it stops and says

after effects error: adding to movie (-1309)
(44 :: 39)

Does this mean anything to anyone?

now it says the output module no longer exists.
It's as if it's losing connection with the (lacie porsch) hard drive.

Mylenium maintains a website that contains reference and troubleshooting information for all of the After Effects error codes. Here's a link to the page that describes the error that you're seeing:

http://voir.mylenium.de/creation/ae_errors/ae_errors_41-45.html

Thanks, I got it to render on to the computer. I think my Lacie Porsche is fat32, and I've been having trouble writing to it.