How to push my Nuget package to the official gallery having my package at my own server

I have a web public folder which I use when I want to share any file so I was thinking on having my nuget package there. I tried to push it using:

nuget push Me.Utility.1.0.nupkg API_KEY -Source http://www.mywebpage.mx/packages

then it asked me for the credentials but none of the ones I put have worked (the credentials are correct). My web folder is not a nuget feed is just a web shared folder. Is not clear to me if the problem is that it should be a nuget feed (something like myget service) or which is the minimum infrastructure that I need to have since this is only one nuget package. I want to host my package at my own server and also I want my package to appear in the official gallery, so in that case should I set up my own nuget feed?
Could you please explain how this should be done?

Solution

MyGet.org supports pushing packages upstream, for instance to NuGet.org. Check out this blogpost to know how to do this: http://blog.myget.org/post/2012/03/01/Introducing-MyGet-package-source-proxy-(beta).aspx