http://bugs.winehq.org/show_bug.cgi?id=27102
--- Comment #4 from Bruno Jesus 00cpxxx@gmail.com --- (In reply to comment #3)
Created attachment 47139 [details] program error details
Are you sure you posted in the right bug? It looks like you are testing Steam and not VoipBuster...
Besides that your wine version is too old, please update to the latest development version before adding new logs (currently 1.7.10).