Digital Signature invalidated when images are uploaded to the form through image fields.

Hello everyone,

I am having this issue with the form I have created using livecycle designer ES2. THe form requires the user to embed pictures by uploading them by clicking on the Image Field.

THis form is required to be signed-off with a Digital Signature so that the file gets locked and no further changes are made to the report. However, I am getting a message that says that the the signature is invalid due to changes made to the form. when I check the signatures tab, this is what i find:

I don't know if the PDF is signing the form first and then embedding the picture and then the Adobe Reader catches that as a change after signature. I don't know how to fix this issue. I would greatly appreciate any help or guidance!

Thank you!