multiple select in form wizard

[Prithviraj Billa]

Hello,
 I'm using form wizard in my application.One of my forms contains modelmultiplechoicefield, after i submit all the forms it gives me an error in the form with modelmultiplechoicefield informing that to "please enter the list of values". Its not saving a list of values instead, its saving only one value which is causing the problem.
 If any one was stuck with the same problem earlier, please help me.

Thanks

Prithviraj Billa