AbleCommerce Shopping Cart Software

thanks for that mazhar, but as stated in my previous post I have already been through all the guides, threads etc relating to installations, hence the reason for posting my question.

I downloaded the demo yesterday, ran it, selected the "Use a 30-day demo key" option, entered the details, clicked "update key" and then finally clicked "return to home page". At this point I get the following error. Server Error in '/' Application. Object reference not set to an instance of an obje...