No thumbs for videofiles when batch adding

[Mimer]

Coppermine install: http://fjotte.dk/gal_da/ **NSFW**
Forum install:
Coppermine version: cpg1.4.13
Forum version:
Test user account: tester / tester
Debug enable mode for everyone
Single file uploads only
Videofiles and thumbs uploaded through FTP

When I batch add videofiles with thumbs only a few files get thumbs.
Direct link:
http://fjotte.dk/gal_da/thumbnails.php?album=119 **NSFW**
Naming:
Best_Of_Stocking_Secrets_Scene_0001.wmv
thumb_Best_Of_Stocking_Secrets_Scene_0001.jpg

I have no problems when I batch add pictures.
Direct link:
http://fjotte.dk/gal_da/thumbnails.php?album=124 **NSFW**

What do I do wrong?

Mimer 

[Stramm]

if the file extension is all caps, then also try using all caps for the thumb

Best_Of_Stocking_Secrets_Scene_0001.WMV (it's case sensitive... so you haven't posted the correct filename)
thumb_Best_Of_Stocking_Secrets_Scene_0001.JPG

[Mimer]

Problem solved.
Every thing works perfect now.
That is: Either uppercase or lowercase for both files extension.
Thanks for all your support Stramm.

Mimer