only aggregate expressions use field aliasing
Unknown property 'oppsearch.searchText'



i got two errors in program
public class oppsearch 
{

   String searchText;
   List<opportunity> results;

   public String getSearchText()
   {
      return searchText;
   }

   public void setSearchText(String s) 
   {
      searchText = s;
   }

   public List<opportunity> getResults()
   {
      return results;
   }

   public PageReference doSearch() {
      results = (List<opportunity>)[FIND :searchText RETURNING opportunity(Account name, amount, Phone)][0];
      return null;
   }

}



<apex:page controller="oppsearch ">
   <apex:form >
      <apex:pageBlock mode="edit" id="block">
         <apex:pageBlockSection >
            <apex:pageBlockSectionItem >
               <apex:outputLabel for="searchText">Search Text</apex:outputLabel>
               <apex:panelGroup >
                  <apex:inputText id="searchText" value="{!searchText}"/>
                  <apex:commandButton value="Go!" action="{!doSearch}" 
                                      rerender="block" status="status"/>
               </apex:panelGroup>
            </apex:pageBlockSectionItem>
        </apex:pageBlockSection>
        <apex:actionStatus id="status" startText="requesting..."/>
        <apex:pageBlockSection title="Results" id="results" columns="1">
           <apex:pageBlockTable value="{!results}" var="l" 
                               rendered="{!NOT(ISNULL(results))}">
              <apex:column value="{!l.account name}"/>
              <apex:column value="{!l.phone}"/>
               <apex:column value="{!l.amount}"/>
           </apex:pageBlockTable>
        </apex:pageBlockSection>
      </apex:pageBlock>
   </apex:form>
</apex:page>