Error using custom Jasper Report

[Lee Mitchell]

I have attempted to create a custom Jasper Report so when I print something from memento it does not print field names. When I try to do this I constantly get an error for the first field. 

The error is net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error Evaluating expression for source text: $F{Item Number}

I have this field setup in Memento as follows:

It is an Integer

Role: Name

Default Value: 0

Set Special Value: Autoincrement

Required is Yes

Unique is Yes

Up/Down Value: 1

Using Jaspersoft I tried setting Item Number to java.lang.Integer and again as java.lang.String. Neither options worked. Is there something I'm overlooking or does someone have some guidance because the wikis on setting up custom reports is terrible