PDF Signature Error-Trouble In Paradise

[FormMakerNovice]

I was happily using a form for my staff to use to request field time. The form contained 3 signature fields, which were all working fine, until I had to go into the form to add more objects, in an attempt to combine two forms into one. After I added the other information on the form. My staff can sign and send me the request, but I am no longer able to approve and sign (the second signature field), because I get the following messages in the order written:

When signing a PDF signature field component, results in the following 3 error messages after each other (text correctly shown, spaces and all)

1) The FieldMDP expression for this signautre is invalid

> After clicking on OK on 1), i get the next err message

2) Creation of this signature could not be completed.

Unknown error

Support Information: CSigField-1013

> After clicking on OK on 2), i get the next err message

3)The document could not be signed.

There was an error when attempting to commit this signature. The document was not saved.

The save operation was cancelled.

PLEASE Help. My staff is hoping that I don't get this form fixed, because of the level of accountability the form provides.