If the resulting skipto value is included in the third column for the variable in question then it should work. A couple things to check for would be:

1. you have no blank rows in your responses.xls file
2. try using lowercase variable names and do this both in your que file and in your xls file.

If neither of those two suggestions help, then please send me or post a zipped copy of the experiment folder (at least the que and xls files) so I can try to replicate the problem here.