Could not find or load main class when calling Weka

[SoulSuite]

I apologise for my \[code\]Java\[/code\] noobness but I am trying to use \[code\]Weka\[/code\] from console and for some reason I get following error:\[code\]Error: Could not find or load main class weka.classifiers.trees.J48\[/code\]I am trying following command:\[code\]java weka.classifiers.trees.J48 -l C:\xampp\htdocs\frequencyreplyallwords.arff -T C:\xampp\htdocs\testfreqrep.arff -p 0 > C:\xampp\htdocs\output.txt \[/code\]I suspect some problems with classpath but since I don't really understand Java is there any simple way of checking if everything is correct?Thank you for any help