What you want to do then is to track the "create account success page" using GOALS and Funnels .. NOT conversion tracking. Why? Because conversion tracking is a measure of how effective your Adwords campaigns are converting and in order for it to track actions, the user must FIRST have come from one of your adwords ads (by clicking it) ... otherwise, the conversion will not record anything.
Plus, conversion tracking is a REVENUE measure, and the create account success page does not generate any revenue for a company, so it would be a mistake to track it with "conversion tracking".
If you want to track how many people get to that point, and the effectiveness of your process up to that page, then you need to setup GOALS (in your Google Analytics account) and a funnel to that goal.
You are allowed currently to setup up to 4 different goals and associated funnels.
Hope that helps.
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