Hi nimbusgb.

Indeed the problem seems strange, but anyway you should only include a Lightstreamer library.
If you want to use also the graphic widgets the 'full' one (lightstreamer.min.js), otherwise you can use the 'core' one (lightstreamer-core.min.js).
In this case it seems that both are included, it could be an indicator of something wrong with the library references.

Regards,
Giuseppe