Hello
I am having trouble installing Xephyr

I run the command: # apt-get install xserver-xephyr

Then get this response after it hangs for a while:

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
xserver-xephyr
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1560kB of archives.
After unpacking 3936kB of additional disk space will be used.
Err http://archive.ubuntu.com feisty/universe xserver-xephyr 2:1.2.0-3ubuntu8
Could not connect to archive.ubuntu.com:80 (xx.xxx.xx.x), connection timed out [IP: xx.xxx.x.x xx]
Failed to fetch http://archive.ubuntu.com/ubuntu/poo...untu8_i386.deb Could not connect to archive.ubuntu.com:80 (xx.xxx.xx.x), connection timed out [IP: xx.xxx.xx.x xx]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Does anyone have any advice?
Thanks in advance.