Looks like author of this thread fixed this issue somehow. I can see he/she played some matches today.
There may be many reasons for this problem. Can You guys tell me what is wrote in lol.properties file located in League of Legends\air folder?
Originally Posted by Yortimel
Maybe you created an account for the wrong server, for example: you created a NA account while living in EU.
If that's the problem you simply have to create a new account on the right server.
They have rather download wrong client instead of creating account in wrong server. I have heard game client has modified to NA for some people after patch. That is why I ask for lol.properties details.