http://bugs.winehq.org/show_bug.cgi?id=35048
Bruno Jesus 00cpxxx@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Severity|critical |normal
--- Comment #1 from Bruno Jesus 00cpxxx@gmail.com 2013-12-03 21:17:59 CST --- Not critical, read http://bugs.winehq.org/page.cgi?id=fields.html#importance
wineskin (or any other third party tool) is not supported here, try its own forums.
Anyway your wine version is too old, recent Steam errors have been fixed in wine 1.7.7, please update to the latest development version of plain wine and try again.