Firstly, make sure that you have specsheets ticked in the print options on the report viewer.
If you still can't see them, you may need to relink the items in your project to the catalogue.
Select any item and then press CTRL+A to select all of the items.
Right click any of the selected items, go to "More..." and click on "link to catalogue".
Press ok if you get a message that some items could not be linked.
Now that they're linked, use CTRL+A and right click again and then go to "Update from catalogue" and click "Spec"
If you still cannot see any specsheets, please give us a call.