The screen appears black
This issue is most likely caused by your anti-virus application. Anti-virus software, such as Webroot, will block applications from taking screenshots. The solution is to configure your security software to allow ScreenSteps access to the screen.
As of this writing, you can find instructions on changing the settings for an application in Webroot at the following URL:
You should change ScreenSteps.exe from Deny to Protect or Allow.