Enhancement problems

On one of my characters, when I go into the enhancement management function, as I scroll over the powers the field which pops up to describe the power and tell what enhancements it will accept, does not show up. Is it an option I need to set? If so which option is it? It is a Praetorian character in the new zones. Is it a bug?

Options > General > Miscellaneous >
Tool Tips
Tool Tip Delay

Thanks.