There For Tomorrow - A Little Faster tab

i miss the 'tapping' sound (i don't know how you guys call it) in the intro riff he 
in other tabs. I play it like this
[ Tab from: http://www.guitaretab.com/t/there-for-tomorrow/200053.html ]
eb|--9-2h5-9/12-2-7p5-----|
Bb|-----------------------|
Gb|-----------------------|
Db|-----------------------| X3
Ab|-----------------------|
Db|-----------------------|

i play the first 9, the 9/12 part and the 7 from the 7p5 part with the indexfinger of my 
hand