Hi. I'm using the Calendar control and binding the field to a Seam class:

<rich:calendar id="calCreationDate" value="#{asset.creationDate}"
 datePattern="yyyy-MM-dd" required="true"
 requiredMessage="Creation Date is required."/>

The backing Seam component looks like this:

private Date creationDate;

public String getCreationDate(){
 return this.creationDate.toString();
}
public void setCreationDate(Date creationDate){
 this.creationDate = creationDate;
}

I'm able to select a date from the Calendar; when I click Submit, it blows up with the error: /metaform.xhtml @68,58 value="#{asset.creationDate}": java.lang.IllegalArgumentException: argument type mismatch

What am I doing wrong? Thanks.