Some adapters (with markings that say "TSOP-48 (NAND X8)") have a manufacturer defect where as the WP# of the device is not pulled up to VCC. This problem will cause the adapters to not be able to ERASE or WRITE data. To fix this issue, you can send your adapter back (contact your sales agent) or solder a single wire from WP# to VCC as show: