http://www.thingiverse.com/thing:210675/#files
I was having no luck printing bridges, but I discovered that my fans weren't working so I remedied tha tproblem.
After that though I am still not having any luck with bridges I am slicing using kissslicer and i think the problem is the way it has sliced it.see the below image,

The 2 lines that go straight across the bridge, look pretty decent, but as soon as it comes to do the diagonals it all goes pear shaped, catching on existing filmanent and turning into goop.Is there a setting in KISS where I can force it to do all them straigth across first, then do the diagonals? as I think that is the problem.