Error 1320 on DraftSight Drafting Tool Installation

Hello everyone,
Someone told me about a software, in fact a 2D drafting tool for designing and drafting purposes. It is named as Draftsight.
I am trying to install this tool on my PC for a days now, but i simply couldn't succeed.
I just keep on getting this error message again and again:

DraftSight Installer Information
I don't know what to do? Has anybody of you been facing such an issue? kindly tell me the solution to this problem. What does this error mean and why does it appear?
Please share your views to help me out.
Regards,
Peter
