Problems downloading file in Pimport export

I successfuly installed pimport and created a profile. When I use "Pimport export nodes as CSV by type" the export is successful and a .csv file is created inside "sites/default/files/pimport/1/" I can see that the file has the right data, but I have two issues: one minor and one major

The minor issue:
1) I get the message "sites/default/files/pimport/1/metadata_20110809_105328.csv ( bytes) written. Click here to download."
Note that there should probably be a byte count inside the parenthesis, but it does not show up

Now the major:
2) When I click on the "here" to get the file, I'm forwarded to
http://tamina.ece.ucsb.edu/drupal6/?q=sites/default/files/pimport/1/meta...
which looks fine, except that I get a "Page not found" error.

I checked the file permissions and they look good. BTW, I'm using Public in the file system setting.