<apex:page standardController="Opportunity" recordSetVar="Oppo">
  <apex:form >
    <apex:pageBlock title="List of Opportunities">
     <apex:pageBlockTable value="{!Oppo}" var="o">
      <apex:column value="{!o.name}"/>
      <apex:column value="{!o.type}"/>
      <apex:column value="{!o.Account.Name}"/>
      <apex:column value="{!o.Account.Phone}"/>
      <apex:column value="{!o.StageName}"/>
      <apex:column value="{!o.Probability}"/>
      <apex:column value="{!o.ExpectedRevenue}"/>
     </apex:pageBlockTable>
     <apex:inlineEditSupport />
    </apex:pageBlock>
    <apex:commandButton value="Save" action="{!Quicksave}"/>
  </apex:form>
</apex:page>

This is my custom page. The changes done after editing the fields are not getting saved after i hit the Save button. There are no errors while saving the code. Please let me know the issue and the fix if you guys know of any.