This is probaly right, i might have got the timing wrong so listen to the song 
I was doing the guitar part but i kept comming back to this bass part. 
if u have any corrections email me at [email protected] 
 
 
g-------------------------------------------| 
d------------8-7----------------------------| 
a--0-3-5-7-------3-5-7-5------0-------------| 
d---------------------------8---------------| 
 
Then just slide 
 
g------------------------------------------| 
d------------------------------------------| 
a--3/12------------------------------------| 
d------------------------------------------| 
 
This hust before the guitar bit. 
 
g------------------------------------------| 
d------------------------------------------| 
a--7-7-6-5-3-0-----------------------------| 
d------------------------------------------|