Do you have the user's manual? Here's a link to the manual:
http://www.aboutprojectors.com/pdf/nec-lt245-manual.pdf
Here's the link to get the software:
http://www.necdisplay.com/SupportCen...6-a3f8dde526fe
I'm not sure what your issue is, I'd start by downloading all the stuff and doing some reading.