Thumbnails not linking properly in embedded gallery2/Drupal site with G2/FCKeditor

I was able to embed Gallery2 into my Drupal site, and into FCKeditor with G2 Image. Everything appears to work well: I click the G2 button icon on the FCKeditor and successfully insert the image from the embedded gallery, choosing the default "Thumbnails with link to image" (for G2's "How to Insert Image" option), then I click "SAVE".

The problem is, when I click on the thumbnail, it brings me to my website's homepage, rather than to the image in the gallery that it should be linked to.

Why do you suppose the thumbnails are not linking properly?

Nothing jumps out at me in my G2 Image config.php file. If it would help, I can post that here. With so many things involved here (Drupal, Gallery2, FCKeditor, G2 Image), I'm at a loss as to where to look.

Any help would be GREATLY appreciated!

SYSTEM INFO:
http://www.mysite.com/gallery2_pics/main.php
Gallery version = 2.3 core 1.3.0
API = Core 7.54, Module 3.9, Theme 2.6, Embed 1.5
PHP version = 5.2.9 cgi-fcgi
Webserver = Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
Database = mysqlt 5.1.30, lock.system=flock
Toolkits = ArchiveUpload, Dcraw, Ffmpeg, Getid3, ImageMagick, jpegtran, LinkItemToolkit, NetPBM, Thumbnail, Gd
Acceleration = none, none
Operating system = Linux gator812.hostgator.com 2.6.28.9 #5 SMP Mon Mar 30 04:51:09 CDT 2009 i686
Default theme = matrix
gettext = enabled
Locale = en_US
Browser = Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Rows in GalleryAccessMap table = 7
Rows in GalleryAccessSubscriberMap table = 32
Rows in GalleryUser table = 8
Rows in GalleryItem table = 29
Rows in GalleryAlbumItem table = 4
Rows in GalleryCacheMap table = 0
Drupal 6.12