connecting to ms access exception(ISAM)

Question

TRYING TO ESTABLISH A CONNECTION TO ACCESS USING C# CODE CREATED AN EXCEPTION INSTALLABLE ISAM..CHANGING THE CONNECTION STRING TO "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +sourceFile + ";Extended Properties=\"Excel 8.0;HDR=NO;\""" PRODUCES A NEW EXCEPTION"Cannot update. Database or object is read-only." PLZ HELP