page is not going to directed page.

i have an asp application. in the application there are many pages in different folders like:
Account(folder)
  --login.aspx
Data(folder)
  --page1
  --page2
 --....
Default.aspx
Global.aspx
menu.Master
Home.aspx
Web.config

I used form application and users need to login to see the page.
when load page first time, page is Home.aspx and asks to login by clicking login button, then it goes to login page, after login, it goes to Default.aspx page.
from the default.aspx page it uses menu to navigate different pages from menu. I have one button (data--. submenu page1, 2, ...) for each page 1, 2, .. in the menu it has correct navigateUrl to the page. 
However, the problem is no matter which page(1, 2...), I click, it always goes to Home.aspx. It weird. Other pages using the same menu navigation work fine and only the pages in this fold ...