Won't let me build my game in flash

I just finished my game and I want to make it into flash. However every time I build it its pops up with 5 errors saying something like this:

C:\Users\Milk\Documents\Pong\Temp\StagingArea\Data\ConvertedDotNetCode\ConvertedDotNetCodeClassIndex.as(5): col: 16 Error: Syntax error: expecting semicolon before .2.

and at the end it says this:

Error building Player: Exception: Compiling SWF Failed: Loading configuration file C:\Program Files\Unity\Editor\Data\PlaybackEngines\flashsupport\BuildTools\flex\frameworks\flex-config.xml

How do I fix this?