White background issue while uploading image from backend using import image feature of cscart

Hi to everyone,

I have set 1 color code from backend of cscart of thumbnail image, now when I try to upload image using import function using csv at that time it not get affected I mean it comes with white background not the one which I specified, but when I upload image using manual upload from product detail page it worked fine so is anybody knowing solution of my problem. I will be glade if someone can help me.

Thanks in Advance.