Mini workflow for SP 2010

Mar 6, 2012 at 7:10 AM

i need an upgraded version that can work on SP 2010. I tried upgrading the initial source code but i get the error "designer must create an instance of type <...BaseActivities.ParallelGrouptaskActivity> but it cannot because the type is declared as abstract" . Please let me know if there is a workaround on this.