I answered to your e-mail. But I will copy the answer to the forum for other people who may have the same question.
The problem is the format of the input file. The format is defined as follows.
Each line represents a sequence.
A sequence is a list of itemsets
An itemset containing one or more distinct items.
An item is an integer
each itemset is separated by -1
each sequence must be ended by -2
If an itemset contains more than 1 item, it is assumed to be sorted.