XML issues in flex

/* This is the datagrid for loading the xml data */
	<mx:DataGrid y="106.95" width="90%" editable="false" id="grdanalytics" height="85%" horizontalCenter="5" cachePolicy="off">
		<mx:columns>
			
			<mx:DataGridColumn dataField="posttype" width="5" headerText="">
			      <mx:itemRenderer>
			          <mx:Component>
			                  <mx:Image source="{data.posttype}" height="5" width="5" maintainAspectRatio="true"/>
			          </mx:Component>
			      </mx:itemRenderer>
			     </mx:DataGridColumn>
			
			
			
		<mx:DataGridColumn headerText="Title" dataField="title" width="45" wordWrap="true">
		   <mx:itemRenderer>
		           <mx:Component>
		                   <mx:Text htmlText="{data.title}"/>  
		           </mx:Component>
		   </mx:itemRenderer>
		</mx:DataGridColumn>
			
		<mx:DataGridColumn headerText="Discussion" dataField="discussion" width="17"/>
			<mx:DataGridColumn headerText="Country" dataField="country" width="12"/>
			<mx:DataGridColumn headerText="Date" dataField="rtDate" width="12"/>			
		</mx:columns>
	</mx:DataGrid>
	<mx:Grid y="64.95" width="90%" horizontalCenter="4">
		<mx:GridRow width="100%" height="100%">
			<mx:GridItem width="100%" height="100%">
				<mx:ComboBox width="90%" id="lstcountry" labelField="label" dataProvider="{sercountry.lastResult.countires.ctnry}" change="handleCloseEventCountry(event);"></mx:ComboBox>
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
				<mx:ComboBox id="pstType" width="90%" labelField="label" dataProvider="{serpostType.lastResult.posttypes.post}" change="handleCloseEventTone(event);"></mx:ComboBox>
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
				<mx:ComboBox width="90%" id="lstdiscussion" dataProvider="{serDiscussion.lastResult.discussions.diss}" labelField="label" change="handleCloseEventDiscussion(event)"></mx:ComboBox>
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
				<mx:ComboBox width="90%" labelField="label" id="lstpages" change="handleCloseEventPages(event);" dataProvider="{getPages.lastResult.pages.pgno}"></mx:ComboBox>
			</mx:GridItem>
		</mx:GridRow>
	</mx:Grid>
	<mx:Grid y="10" width="90%" height="46.95" horizontalCenter="4" verticalScrollPolicy="off" horizontalScrollPolicy="off">
		<mx:GridRow width="100%" height="100%">
			<mx:GridItem width="100%" height="100%" horizontalAlign="left">
				<mx:ComboBox width="204" id="lstCompanies" labelField="name" dataProvider='{getCompanies.lastResult.companies.company}' change="HdlCompanies(event);"></mx:ComboBox>
				<mx:Button label="Refresh" id="rfresh" click="refreshData()"/>
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
				<mx:TextInput id="txtSearch"/>
				<mx:Button label="Search" id="btnSearch" click="RTSearch()"/>
			</mx:GridItem>
		</mx:GridRow>
		<mx:GridRow width="100%" height="100%">
			<mx:GridItem width="100%" height="100%">
			</mx:GridItem>
			<mx:GridItem width="100%" height="100%">
			</mx:GridItem>
			<mx:GridItem width="175" height="100%" horizontalAlign="left">
				<mx:RadioButton label="Company" groupName="filterSearch" selected="true" id="rdCompany"/>
				<mx:RadioButton label="All" groupName="filterSearch" id="rdAll"/>
			</mx:GridItem>
		</mx:GridRow>
	</mx:Grid>
                                  

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