problem in installing packages

[skkmaths]

i get this error when ever i try to install package from synaptic package manger..

W: Failed to fetch http://ubuntuarchive.hnsdc.com/pool/universe/u/unrtf/unrtf_0.19.3-1.1_amd64.deb
404 Not Found


please help me to solve this

[garvinrick4]

i get this error when ever i try to install package from synaptic package manger..

W: Failed to fetch http://ubuntuarchive.hnsdc.com/pool/universe/u/unrtf/unrtf_0.19.3-1.1_amd64.deb
404 Not Found


please help me to solve this
You have no internet connection or ubuntuarchive.hnsdc.com is down.
Try another mirror in Software Sources.

[rukiaEnix]

as he says