I believe this has something to do with the display resolution. For karaoke applications, you have to meet certain requirements related to display resolution so you can see all the lyrics.
These are the system requirements for this application:
System requirements: Siglos Karaoke Professional works on Windows 7, Vista and Windows XP. 1.5 GHz or faster processor, 1 GB RAM, and 32-bit display (1024x768 resolution is required to display all windows properly).
As you can see, there is a resolution requirement as well. Anything below that resolution will be displayed in a wrong way.
I would also check the configuration settings available within the application.