Make sure that after selecting the object in object mode, when you go to the texture editor, you select UVs selection (Right-click>UVs anywhere in there), and your tool is the select tool(you may want to reset it if it's possible).
if you still can't work with them post a pic.
Hope it helps,
Benny
When in doubt, delete history and freeze transformations.
My latest snake game
(Requires DirectX9 SDK and Framework)