Do not rely on your software to sell itself, be VERY prepared of left-of-field questions and a grilling over your understanding of your potential market - it's size and your competitors. There is also a very good chance that potential investors will know a great deal more about your target market than you do so don't wing it and don't preach to them.
I would expect to be asked some of the following questions, make sure they are not a show stopper for you :
Why did you develop the software in a high-level compiled 3rd party language? Do you lack the necessary low-level programming skills? What happens when the language is no longer marketed, how will you support, maintain and update existing customers? What is the lifecycle of the product? How soon will we see a return on our investment.... blah... blah... And finally.... Why did you develop this software? What is it's purpose and what are your long terms goals for it?
I would expect to be asked some of the following questions, make sure they are not a show stopper for you :
Why did you develop the software in a high-level compiled 3rd party language? Do you lack the necessary low-level programming skills? What happens when the language is no longer marketed, how will you support, maintain and update existing customers? What is the lifecycle of the product? How soon will we see a return on our investment.... blah... blah... And finally.... Why did you develop this software? What is it's purpose and what are your long terms goals for it?