It's not your map or shader. The probllem is your UV layout (it's messy, a lot of overlapping) and your shader has texture connections, unsmoothed it renders fine, soon as I hit 3 and render, it gets to about 95% done and crashes. I can see how the problem didn't come up with Maya software renderer because it doesn't take adavantage of the smooth preview.

The problem went away when I :

1. I slapped an automatic mapping on it.

or

2. Broke all texture connections on the shader.

edit: forgot the "or" just so you know you don't have to do both