Unable to prepopulate form

I'm having trouble pre populating new form on substitution 

http://www.jotform.com//?formID=50648892504967

Hi,

Could you tell us more about your problem?

Here are the guides that might help you on prepopulating the form fields:

http://www.jotform.com/help/71-Prepopulating-fields-to-your-JotForm-via-URL-parameters 

http://www.jotform.com/help/286-How-to-Populate-Field-with-a-Value-from-another-Field 

See which one works for you best.

Kind regards.