error when download .acsm file adobe digital editions

[alfonsoc36004546]

When i download a file .acsm, i get this error by Adobe Digital Edtions:

Error creating backup file d : / data / documents / my digital editions / backup_manifest.xml details : error # 2038

Thanks

Alfonso Cataldi

[melitinar70455803]

A mi me sale el Error: Check Activation. Ya no sé qué hacer. Saludos.