Why does DataSet and Query editor dialog show valid expression that then doesn't work in Preview?

[okorng]

I'm new to Jasper Reports and am having trouble referencing a nested bean field.  I am running the standalone Jaspersoft Studio 6.0.4.   I add a TextField to the Details band of the new Jasper Report, then double click on the TextField which opens the Expression Editor dialog, then I select the nested bean from the center list which displays all the getter function in the right-side list.  I double-click one of the getters, "getCompanyLegalName()" and the corresponding expression gets added to the editor pane above.  That expression is "$F{userRegistrationStatus}.getCompanyLegalName()"  and it is accepted without any error message.  I then click Finish, then compile the report, then click Preview.  Upon trying to Preview the report it throws an exception stating:

net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: $F{userRegistrationStatus}.getCompanyLegalName()

at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:506)

at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$20(ReportControler.java:481)

at com.jaspersoft.studio.editor.preview.view.control.ReportControler$5.run(ReportControler.java:362)

at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Caused by: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: $F{userRegistrationStatus}.getCompanyLegalName()

at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:264)

at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:610)

at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:578)

at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:1015)

at net.sf.jasperreports.engine.fill.JRFillTextField.evaluateText(JRFillTextField.java:572)

at net.sf.jasperreports.engine.fill.JRFillTextField.evaluate(JRFillTextField.java:556)

at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:258)

at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:454)

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2029)

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:755)

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:262)

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:122)

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:551)

at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:119)

at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.ClassCastException: gov.dot.fmcsa.compass.urs.services.urs.URSRegistrationStatus cannot be cast to gov.dot.fmcsa.compass.urs.services.urs.URSRegistrationStatus

at TestReport1_1432323832204_788904.evaluate(TestReport1_1432323832204_788904:201)

at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:251)

... 14 more

Why is it throwing that class cast exception?  Since when can a class not be cast to itself??  What am I missing here?