Hi all,
I never seen this type of a problem with data import wizard before, we are running updates on accounts using the data import wizard, the upload has a success results but none of the records have been updated. 
Any idea why this might hapen? any advise is much appreciated,

I have a professional edition org and i want to set sharing rules on Opportunity Object  which is not available. Hence i am looking to go for Apex Managed Sharing. Would it work . If yes please help me with the solution.

Its urgent