Active stack should only come on if the syntax you're using is incorrect. You must be trying to add an item but using the incorrect code for it. what exactly is the syntax you are keying in to come up with this message?
Where did you download SK from? Go to
www.mud-master.com and get it from there, make sure you have v.2.1.4 which is the latest one. Unzip the file into a folder and then click on the application execute file.
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