Adobe Acrobat Reader DC can't fill in Signaturefield of Form made Acrobat Pro 8.1

Adobe Acrobat Reader DC can't fill in Signaturefield of Form made Acrobat Pro 8.1. I have made a Form in Acrobat Pro 8.1 and try to sign this with acrobat reader DC. I can click all I want but the signature field doesnt work.

People need acrobat pro 8.1 for this? Or is there another solution?

Thanks in advance,

Dylan