How can we get into MCC account with existing adwords account?

To use developer token on live site we need a MCC account. But we are facing a problem that we can not upgrade our existing Google Adwords account to MCC account. We are getting the following message: "The login is already an AdWords account." How can we get into MCC account with existing adwords

Unable to install aw_api_php_lib

Hello, hope somebody could help me, im new. I got flowing error when tried to install aw_api_php_lib on my own server. My php version is : 5.2.5 and soap is enabled on server. SoapFault Object ( [message:protected] => Unmarshalling Error: UndeclaredPrefix: Cannot resolve 'ns1:CampaignSelector'