When selecting the 'Layer' toolbar button [equivalent to '_layer] in AutoCad 2006 LT installed 2 months ago, nothing happens. Therefore, it is not possible to select all, or multiple layers to make changes or take desired actions.
Oper. system is WIN XP Home. I did a repair install to correct Design Center block handling, but this problem with LAYER was not corrected. It did work for a few weeks, but stopped.
How can I fix?