Page break "after" tablix

Hi, 

Have checked the option "add page break after" to a tablix as I always want to start a new page after this control is populated. 

Problem is that it does not always do this, if there's not much data to show in the control (the one that is ticked) then the next control stays on the same page.  

How do I force SSRS to start a new page? 

Using BIDS (Visual Studio 2008) & SQL 2008R2. 

Thanks