Please affix dsc of designated partner error

I am in the process of filling Form 11 for a LLP. The form was duly filed with no pre-scrutiny errors. When I tried to upload the same I have been getting the error “DSC of Designated Partner not affixed”.I attempted the following solutions with no positive results

1. Deleting the Certificates expired certificates from the content tab of Internet options
2. Downloading new form and affixing signatures
3. Savings file in different name
4. Clearing Signatures and  reaffixing signatures in the e-form 11
5. Clearing Temporary files, history and cookies from the internet options
6. Checked the versions of the Java, Adobe reader
7. Enabling Java Content in Browser
8. Security setting in Java Set to High (lowest possible in the version)
9. Checked Din against DSC and Registration of DSC with MCA

Operating system            :Windows 7

Adobe Reader                   : Adobe Reader XI Version 11.0.17

Java                                       : Version 8 Update 91 (build 1.8.0_91-b15)

Browser                               : Internet Explorer 9.0.8112.16421

I have filled forms other eforms which did not have such errors.Please do advise me of a solution to the persisting issue.