If you're not seeing any packages in the web application (and you've verified that they are, in fact, in the right place on disk), this means that the packages aren't getting indexed by the ProGet Service.
Since you've already restarted the ProGet web service, it's likely a problem with the individual package.
Check to see if there are "indexing errors" in the admin section; this will give some insight into what the problem might be. Often times, the file name does not match the package name/version; this is a requirement. If you're package is named MyFoo and is version 3.0.1, it must be MyFoo.3.0.1.nupkg and have an appropriately named MyFoo.nuspec within it.
If there are no errors logged, then you can try to run the service interactively. Simply stop the Windows service, then run the .exe file and select the appropriate option to run.
Another option to verify that the indexing is working OK is to pull a package from a remote connector (like JQuery or something), then drop that package in another feed (that doesn't use a connector).