I have Created the Visual Force Page :
<apex:page standardController = "Contact">
<apex:form>
<apex:pageBlock>
<apex:pageBlockSection>
<apex:inputfield label="Mobile #" value="{!Contact.AccountId}" />
<apex:pageBlockButtons location="top">
<apex:commandButton action="{!Cancel}" value="Back"/>
</apex:pageBlockButtons>
</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>
with the Account Id as Lookup Relation of all accounts ,i am unable to add the field Label for Particular Look Up Field, while saving it is showing Error: apex:pageBlock must be the direct parent of apex:pageBlockButtons How to Rectify the Error
<apex:pageBlockButtons>...</apex:pageBlockButtons>
content to just below the<apex:pageBlock>
opening tag.