Characteristics issue in front-end (hikamarket)

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 1.7.0
-- PHP version -- : 3.5.1

Hi,

I am able to save characteristics for a product in the back end, but when a vendor tries to do this in the front end they are not saved.

Any ideas how this can be fixed?

Thx, Darrell

update --- fixed