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Error when editing in 2008 version



I tried installing which succeeded, but I didn't see the task in the Control Flow.
Based on this discussion I right clicked the toolbox, Choose Items and on Tab SSIS control flow items clicked on the ReportGeneratorTask checkbox. After droppig the task from control flow to design panel I tried to edit the task, but received this error:
__Cannot sho the editor for this task. Could not load file or assembly 'System.Drawing, Version=, Culture=neutral, PublicKeyToken=... or one of its dependencies' The system cannot find the file specifid. (mscorlib)__ 
Really like to use your ReportGeneratorTask, how can this be solved? Using SQL Server 2008 by the way. Thanks!