Shoutbox does not work with Frameprevention module

Shoutbox does not work with Frameprevention module. After installing Shoutbox automatically opens in new window. Pressing Back button returns to the new window, making impossible to see websites pages, untill you delete the module's directory. After disabling Frameprevention and reinstalling Shoutbox it works perfectly. At least it is what happened with my site. I am using Firefox, did not test in IE. I could use both of the modules at the same time.