SuperManager uses a series of libraries offered by Internet Explorer to navigate through Yahoo's and other shopping carts' back ends to download data, charge credit cards and other actions.
Try Using SuperManager's Alternative IE Integration
In some cases SuperManager will be able to correctly integrate with Yahoo by just switching the approach it uses to grab XML files. Try this by going to "View", "Program Settings" and enabling the option "Use Alternative IE Integration". Press "Ok" to save and close the program settings and try it again. If it still doesn't work, switch that setting back and try the suggestions below.
If that doesn't fix the issue, try the following:
http://www.thesupermanager.com/forum/index.php/topic,1164.0.html
If none of these methods fixes the problem, please contact SuperManager support for help.