Take a look here in case it covers something you are mising.
http://my.safaribooksonline.com/book/-/9781849518482/3dot-tracking-visitors-with-piwik/id286760845
Can i ask what exactly are you trying to quantify?
Since your 2 pages are in the same domain and it seems you want to understand the flow between 2 pages could you not use the transitions report?(Again i feel i am guessing as to what you desire to track)
http://my.safaribooksonline.com/book/-/9781849518482/3dot-tracking-visitors-with-piwik/id286760845
Can i ask what exactly are you trying to quantify?
Since your 2 pages are in the same domain and it seems you want to understand the flow between 2 pages could you not use the transitions report?(Again i feel i am guessing as to what you desire to track)