Ssenkahdavic on 28 June 2010
All I could find is you have to be at least level 25 (which you said you are) but:
Check this out from Gamespot.
And this from Namcos website.
I do remember that part. Only took me a few attempts to get it to pop I think (at least I do not remember it being a major pain in the ass). Sucks you are having problems with it
