أخوتي الافاضل أرجو المساعدة في حل هذة المشكلة (ubuntu 9.04)

When I want to click the Reload button to update the list of the available applications in the synaptic package Manager or Add/Remove , I get the following list. my computer is connected to the INTERNET and I can surf the web. any hint please!!!!!!!!!!!!!!1



W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...ty/Release.gpg Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...es/Release.gpg Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...ty/Release.gpg Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/...tion-en_US.bz2 Could not connect to us.archive.ubuntu.com:80 (91.189.88.31). - connect (111 Connection refused) [IP: 91.189.88.31 80]

W: Some index files failed to download, they have been ignored, or old ones used instead.