I failed to deactivate CS3 on my old computer before installing on my new computer. Now I can't use InDesign. What next? Thanks
you're entitled to two concurrent installs/activations so, if that were your only activation you would not see an activation error.
in any case, if you need to reset your activations, contact adobe support for an activation count reset, http://www.adobe.com/support/chat/ivrchat.html