[Ubuntu Software Centre] Eclipse/Netbeans Repository problem

[Asymptotic]

Using the Ubuntu Software Centre I tried to install Eclipse and got a fail message telling to check my connection, its fine...

I then ran

sudo apt-get install eclipse-platform --fix-missing

after saying stuff that seems normal it then says:

Err http://gb.archive.ubuntu.com/ubuntu/ lucid-updates/main libservlet2.5-java 6.0.24-2ubuntu1.1
404 Not Found
Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/main/t/tomcat6/libservlet2.5-java_6.0.24-2ubuntu1.1_all.deb 404 Not Found

I guess either I need a port open that isn't (unlikely) OR the file its looking for is obsolete and no longer there..

Anyone with some insight?

[Asymptotic]

Fixed.

After poking around I ran this command:

sudo apt-get clean && sudo apt-get update && sudo apt-get install eclipse-platform