xppen artist 12 2nd gen buttons

I bought an xppen artist 12 2nd a week ago and it is behaving strangely. First, when I readjusted the shortcuts on the side buttons, they simply stopped working, they only started working again if it was the default setting, and even then one of them that has the Ctrl++ shortcut doesn't work. Also, it seems like there is a delay in the pen. Could this be a defect in the table or my laptop? I don't know what to do.