Same problem "Server contacted but Gallery not found...." on vBulletin embedded

Hello,
i have read the FAQ and tried all the solutions without success.

Specs are:
- shared hosting on Linux
- Gallery 2.2
- Remote plugin v. 1.0.9
- Upload Applet v. 1.0.7
- Embedded in vBulletin 3.5.3

Gallery works just fine both embedded and straight in, logins are automatic from vBulletin. Can upload data perfectly.
Created a gallery_remote2.php file (but it seems it is not used), and tried the "forceGalleryVersion.n=2" property.

Attached log file. It seems that the applet is opening this URL: http://panzerlehr.org/gallery2/main.php and expecting a different answer instead of the Gallery HTML page.

Thank you for all the help you can give!

Rumba