Migrating from Indy 9 to 10 with Delphi, TIdSchedulerOfThreadPool problem

I'm in the process of updating a Delphi app from Indy 9 to Indy 10.

It's quite painful, as apparently a lot has changed.

I'm stuck at one step.

Here is the old code (working with Indy 9):

A Thread Pool is created and every thread of the pool is initialized and then started.
The individual threads create an indy http client (but it does not matter here).

  TUrlThread = class(TIdThread)

...  

var
  i: Integer;
begin
  // create the Pool and init it
  Pool            := TIdThreadMgrPool.Create(nil);
  Pool.PoolSize   := Options.RunningThreads;
  Pool.ThreadClass:= TUrlThread;

  // init threads and start them
  for i := 1 to Options.RunningThreads do
  begin
    with (Pool.GetThread as TUrlThread) do
    begin
      Index     := i;
      Controler := Self;
      Priority  := Options.Priority;
      Start;
    end;
  end;

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The TIdThreadMgrPool class is gone with Indy 10.

I've looked for a replacement and TIdSchedulerOfThreadPool looks like a winner,
but I cannot get it running.

Here is the modified (Indy 10) code:

  TUrlThread = class(TIdThreadWithTask)

...

 var
  i: Integer;
begin
  // create the Pool and init it
  Pool            := TIdSchedulerOfThreadPool.Create(nil);
  Pool.PoolSize   := Options.RunningThreads;
  Pool.ThreadClass:= TUrlThread;

  // init threads and start them
  for i := 1 to Options.RunningThreads do
  begin
    with (Pool.NewThread as TUrlThread) do
    begin
      Index     := i;
      Controler := Self;
      Priority  := Options.Priority;
      Start;
    end;
  end;

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I get an access violation exception here (this is indy code):

procedure TIdTask.DoBeforeRun;
begin
  FBeforeRunDone := True;
  BeforeRun;
end;

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FBeforeRunDone is nil.