Hey kids I use to use this site all the time and I remember when you placed the cursor over a chord lets sa Asup7 a little chart would show you the correct way of placement for your fingers. Did they take this nice option off? If not how do I get it to work again,
At chord tabs with bluish chord names you can just hold your pointer over it and it will show what frets that should be held. If you saw an Asup7 chord and you couldn't do it, then it's probably because it's no such chord with that name.
Since the P letter is no where close to the S letter, I guess you didn't make a typo.
Short: Asup7 is not a chord, and there wouldn't pop up a window showing how to play it then.