data picker params in report

Hello,

I have a problem with a report that include a data picker like a param. In pdi version 7 the report does work but when publish it in server (pentaho 7.0) it shows me "fatal error; error analyzing parameter" when I try to introduce a value in data picker, then I can run the report
However it works perfectly when I publish it in pentaho v.6

I don't know how to resolve that. Any idea?