Problem when editing individual product images upload

Question

PROBLEM: In Magento admin while adding products image is not uploading. I tried by uploading in different browsers but it too doesn't worked. I have given 777 file permissions to media folder. When I upload image, image is stored in media/tmp/catalog/media folder. Magento redirect to the login page and does not save the info.

We are using Magento version 1.9.2.3. It happened in product edit time.

How can I solve this issue?

Answer 1

I have solved problem by set cookie life time 3600. previously it set to 0 then it's not working. Thanks @simonthesorcerer for guide me.