Could you provide us more information about your environment, PHP, web server, etc. ? Do you have any errors, warnings in debug output?
You can find all packages http://ez.no/download/ez_publish/ez_publish_3_stable_releases/3_8/packages in case when you have problems with internet access.
I had a similar problem with packages during instalation.
I tried to install eZ publish 3.8.4 from instalation package on my laptop with Win XP. I did not have internet access, so I used pendrive with downloaded packages.
After uploading them, eZp said something about online repository, and that there is possibility to add them manually. However the error message appeared again and again.
I was prepering myself to the presentation and gave up than.
What was it? Hmm...
