Datatable doesn't show up ;/. It is a custom control template and rows are saved in document attached to a workflow, but I think it doesn't matter.
I would like to know where is default template for details page, because I want to present some tasks to different users(not owners). They will have access only to 'show task page'. Currently they have different look that owner of the task. They see many more properties of the task, what I want to change.
//edit
Ok, I got datatable to work, but the second problem remains.