my upgrade is failing after giving this message

Failed to fetch http://in.archive.ubuntu.com/ubuntu/...buntu2_all.deb Connection failed [IP: 91.189.88.46 80]
Failed to fetch http://in.archive.ubuntu.com/ubuntu/...untu2_i386.deb Connection failed [IP: 91.189.88.31 80]


there is no problem with my internet connection
please help.