Using a predefined test set instead of using the split command when using the classifiers

Hi all,
I am trying to test Mahout's classifier, but skip the split step (as was asked in this question). I have three categories and "other" for my test. When I use the split command and let Mahout split it (say, with randomSelectionPct = 20) I get perfectly good results. But when I try splitting the input myself into test and training (so I can compare with other solutions) the classifier chooses "other" for everything.
I am following the suggestion from this question. Does anyone have an idea of how I can do this, or what I am doing wrong?
Thanks in advance!Eyal

Mahout 0.9: Using own test set instead of using split command
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| Mahout 0.9: Using own test set instead of using split co...I have referred to these two links to run mahout NB classifier [1] http://tharindu-rusira.blogspot.com/2014/01/naive-bayes-classification-apache-mahout.html [2] |
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