If you get different CKSUM each time you try, make sure to clean the legs. Dirty legs causes erratic results. Sometimes, the CKSUM is REALLY close, but not quite. Clean the legs and all is good. Dave To UNSUBSCRIBE from techtoolslist, send a message with "UNSUBSCRIBE" in the message body to: techtoolslist-request@flippers.com. Please direct other questions, comments, or problems to jrr@flippers.com.