product not saving any changes

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.4.8
-- PHP version -- : 5

hi guys ive spent all day trying to find fixes, tried all my knowledge of joomla and hikashop, but still, ive had no joy.


for some reason, when im in a product i cant do changes to the product:

add to category
add price
add image
etc

if there is someone out there that has come across this issue please help as im losing money every day this is not fixed

regards
David

Is it new installation of Hikashop 2.6.1 or did you upgrade from previous version?
Is there any error or notice while saving product when you turn debug mode on in Global configuration?