This worked for me (from HDINFO's comment above):*) Go into the object
properties of your signature field.*) On the 'Signature' tab, IF you
have the box checked for "Lock fields after signing", but the drop-down
box is blank,then you can either recreate your fields collection, or you
can uncheck that box.Once I recreated my collection and re-assigned it
to the signature field, everything worked perfectly!