Tnvelaivaaippu.gov.in — Tnvelaivaaippu.gov.in Enter Caste Error Not able to update my profile

Sir/Madam,
My name is K.Pallavi USER ID : ERD2014F00002449.

When I was trying to update my profile, It shows validate as "Please enter the CASTE". But that field is not visible that is disabled... PLEASE LOOK AT MY CASTE AND CHANGE IN IT FROM YOUR END..
Community : SCA
Caste : Arunthathiyar.

I herewith attached the copy of my community certificate and employment card generated.

Because of this, I am not able to update my Post Graduation as Professional & Executive Employment Office Chennai/ Madurai website needs this updated profile.

Thanking you sir/madam...