I have a client that wants to to take control of her Adwords account. I walked her through and had her send me an invite. Once she did that - Google sent me an e-mail that I had to click on a link in which I did. After that, it took me to a page on Adwords where I selected I would be using my Adwords account. After I logged in - it took me to a page where it said to refresh page content. I've done this a few times and it still won't allow me to take over her account. I tried to get in touch w/ Google - which is next to impossible since that want you to select a question and send it to them. Just wondering if you guys have encountered this problem before.
this is a common problem-try using a different browser to log on to the account. I had trouble with IE, so I used Firefox and it worked no problem. Hope that helps.