I click on an object in my Tabs and get Insufficient Priviliges...You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary.
I am an admin in my sandbox. How can I give myself rights to see this object?
Edit: The list view of that object overridden with a VF page. The page is real simple:
<apex:page >
<apex:enhancedList type="rf_Proposal__c" height="300" rowsPerPage="10"
id="ProposalList" customizable="False" listId="00BM0000000syQK" />
</apex:page>