I appear to be able to export a 'runnable jar' from my eclipse development environment but it does not export the pointer to the runnable main class com.lightstreamer.LS

I know I have got this working once before but I appear to have lost the knack!

Developed as ber the instructions here. It all runs tidily if launched from Eclipse and the run configuration specifies the .LS main class. but when exporting a runnable Eclipse appears to ignore the class specified in the config.