[Heinkel]

I've had this pair of headphones for about 3 - 4 months now and they're starting to crack on one side. If I wear them now they will break in a matter of days or hours. 
 
Here are some screenshots of the crack. Any advice or help would be greatly appreciated.
 
http://i.imgur.com/pYGkNKk.jpg
 
http://i.imgur.com/AFNlFnq.jpg

 

[Heinkel]

So I found this (http://www.head-fi.org/t/551961/fix-completely-cracked-and-broken-headphones-guide) which seemed to be a good start.. but my crack is near the base and I honestly have no idea where to begin. Should I use some sort of bonding agent or glue?