Page_Load doesn't run on certain pages

Hi,
This post relates to my initial post/problem and could be combined: http://forums.asp.net/t/1960730.aspx?Losing+the+program+after+a+re+direct+in+the+code+behind
I inserted the following code in the Page_Load method of the CodeBehind .vb file for 10 different pages in my application (WingTop Toys).
   MsgBox("beg <or end> of <name of the page> Page_Load").    So an example is:  MsgBox("beg of About Page_Load")
When I run the website, each time I go to a page the Message Box pops up letting me know that method ran for 8 of the pages.  But for 2 of the pages the Message Box d ...