Keeping DevExpress Controls Inline On Web Forms?

I've just replaced Telerik controls in a small web project with DevExpress controls, but now, despite my adding an inline display div as container, these controls are no longer rendered inline. What could have caused this, and what can I do to get these errant controls back inline?

<div style="display: inline;">
<label>
Department:</label>
<dx:ASPxComboBox ID="deptCombo" runat="server" AutoPostBack="false" ValueField="DeptId" TextField="DeptName" Width="250px" OnSelectedIndexChanged="deptCombo_SelectedIndexChanged">
</dx:ASPxComboBox>
<label>
Production Date:</label>
<dx:ASPxDateEdit ID="productionDatePicker" runat="server" DisplayFormatString="{0:dd/MM/yyyy}" EditFormat="Custom" EditFormatString="dd/MM/yyyy"
ondatechanged="productionDatePicker_DateChanged">
</dx:ASPxDateEdit>
</div>