forecastLoad vs actual load

hello everybody. i have 3 months of data and i'm trying to make a short-term load forecast using neural networks. my loads are in kW. i'm based on this project: http://www.mathworks.com/matlabcentral/fileexchange/28684-electricity-load-and-price-forecasting-webinar-case-study/content/Electricity%20Load%20&%20Price%20Forecasting/Load/html/LoadScriptNN.html. ..but i have a problem. there is a big difference between forecastLoad and actual load. please help me.thanks you.

[Greg Heath]

You have neither showed what tou have done nor showed/explained the error messages.

[UPT]

Greg Heath,thnx for answering..i'm based totally to the example above with the only difference that my datas are for 3 months and not for 4 years. there isn't any error message.the only problem is that my loads are in kW,for example 0.3 kw but the forecastLoad is very big, for example 1394..i don't think that this is normal,or i'm wrong?!