Head start a presentation and to attract listener's attention

[rahultaing]

Could anyone tell me what is the best way to start a presentation and to keep your listener's involved with it. Most of the presentations I have attended, I have seen people yawning after 10 mins, because they have no idea of what's going on. I am a new employee in a software firm, I have developed a tool which I have to demonstrate in front of my seniors 10-15 people. I wonder this might not be a big deal for them but it is for me. How can I make sure that I keep them involved and make sure that I make use of 10 manhours that is being utilized during that presentation. I have made my presentation very simple but I am not getting a head start to it. What is the best way to start my presentation.

An early reply will be greatly appreciated.

Thanks
Rahul Taing