There are several hours I try to install trinity, with the following 
settings:

deb 
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu natty 
main
deb-src 
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu natty 
main
deb 
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps-v3.5.13/ubuntu 
natty main
deb-src 
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps-v3.5.13/ubuntu 
natty main

but, mirror.its.uidaho.edu is unreachable.

Are there any alternative mirror?