Two suggestions:


  1) Ensure that you are rerendering the apex:pageMessages block of your vf page from the
  command button which is executing the AddTask method.
  2) As suggested
  by CoryCowgill instead of return null; use return new
  pageReference('/'+Ntask.Id);


Insert Task controller not executing from VF page
Recording to this page https://appdb.winehq.org/objectManager.php?sClass=version&amp;iId=9597&amp;iTestingId=56155, I should install older version of wine (max. 20041019), in order to run D2GS (game server).

Can anyone help me with that?

As I've heard, the easiest way is with PlayOnLinux, but I'm looking for a direct way of installation.

Thanks!
