"The table could not found" and " the report need more information"

[C# Programming]

i have 2 crystal reports both of them have different datasource.These reports were working tommorrow but now when i run reports it show errors one report shows"the table could not found" and another report shows "the report need more information". i rebind my reports with database but error is still there i googled my problem but no solution works.plz help if u know its solutions