When you click a link in the Guitar Leads Master Volume table of contents, it should open an new browser window in which the flash-based lesson should appear.  If the browser window opens and it is blank, here are a couple of options to check.

Fix 1:

Please go to your control panel
Select Folder Options
Select the File Type tab
Scroll down in the list of file types that appears until you find swf
You should see the IE icon associated with the swf file type.
If it is already selected go to Fix #2.
If it is not, select the change button and then select IE.

Save your changes close the window and then go back to the Guitar Leads icon and open the program and try again.

Fix 2:

In IE Select Tools
Internet Options
Advanced
Scroll down thru the list -- located a yellow padlock associated with Security
The first two settings in this category should be checked

Allow active content from CD's to run on My Computer
Allow active content to run in files on My Computer

If these are not checked, please check them save the settings, close the window and then again
open Guitar Leads and try to open a lesson.