Many times I have heard that, many developers finds blank content pane in CHM, so to resolve this Issue, here I am providing the solution Below.
First of all lets see what exactly the problem is- Problem: When creating a CHM File and trying to to open a same CHM file on different system insted of your content in the right-hand pane of the window, you only see a cryptic browser message "Navigation to the webpage was canceled" or similar.
Resolution: To resolve this issue, carry out the following steps:
Right-click the .CHM file and choose Properties
On the General tab, click the button labeled "Unblock"