Thanks for your advise. As you wrote, the price list date have been corrupted.
However, I still have problems after creating new price list.

1. “Download check” is cleared after the first time I check it. ( If I check it again, it keeps checked)

2. If I set large size more than 500x500px in the price list, download file becomes 0 px, and image cannot be downloaded. Is this problem caused by
php.ini setting or GD?

3. In certain condition, file extention ‘jpg’ is still dropped. First time I tried
to download, it was ok, but now the file name doesn’t have the extension.
I try to find the “certain condition” but I don’t find it yet.

4. If I open gallery page with ie8 “add to cart” link doesn’t work. Besides,
the link is added every time I open the page.
(http://studio-spark.com/gallery/?ims_gallery=gallery-12)
first time:
Add to cart

2nd time
Add to cart
Add to cart

5.In the receipt mail lines are repeated

Downloads
Downloads

Downloads
tram
Downloads
tram

Thanks your for the new version. I updated and tried it now, but still I cannot
get the image from the link. File size of the image is about 50kb, and, when
I open it with text editor, I found notice messages in it as follows:

The top part of jpeg file————————————————————-

Notice: Undefined offset: 1 in /var/www/html/gallery/wp-content/plugins/image-store/admin/download.php on line 58

Notice: Undefined property: ImStoreDownloadImage::$store in /var/www/html/gallery/wp-content/plugins/image-store/admin/download.php on line 83

Notice: Trying to get property of non-object in /var/www/html/gallery/wp-content/plugins/image-store/admin/download.php on line 83
ﾘ・JFIF



 <CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 100
————————————————————————————————–

When I open the sopping cart also notice messages are appeared.

Notice: Undefined index: color in /var/www/html/gallery/wp-content/plugins/image-store/_store/cart.php on line 82 Notice: Undefined index: color in /var/www/html/gallery/wp-content/plugins/image-store/_store/cart.php on line 105

When I open the link of the receipt mail, White screen appears.

What do you think is wrong?

URL of the web site:
http://www.studio-spark.com/gallery/

URL attached with download link:
http://studio-spark.com/gallery/wp-content/plugins/image-store/admin/download.php?_wpnonce=feb21f71d2&img=8e296a0619&sz=Full%20Size&c=color

I have other problems of links on the receipt mail. In the link url, a slash
should be missed between “admin” and “download.php”>”admindownload.php”.

Even though I add a slash and open the url, notice message appears: “Undefined index: _wpnonce in /var/www/html/gallery/wp-content/plugins/image-store/admin/download.php on line 24 “.