Its likely its getting hung up on animation as that changed completely in the move to 2.4.
Also imagemagick is missing...
http://www.imagemagick.org/script/binary-releases.php#windowsAlso there is a 64bit version of Hugin here:
http://sourceforge.net/projects/hugin/files/hugin/hugin-2011.4/Try turning off animation.
If you check "panorama" it will render a pano from the cameras viewpoint. so you won't need your 6 frame animation (which I can see by looking at the screenshot, you are using to do the skybox.)
I strongly suggest you test it with quality 0.1 first and maybe 2000 pixels instead of 6000.
It creates bat files which run the tgd files it also exports.
If you press "Render" button it wil initiate renders. If you press "batch" it will only create tgd and bat files.
As you have your own renderfarm - I suggest you pick up all th etgd files and render them on your farm.
Then bring all the images back to the directory and run the bat files to recombine.
The recombine batch files look like:
tmp_blahblahblah_recombine.bat
The pano stitching batch file looks like:
tmpblahblahblah_Collate_and_Build_Pano.bat
After rendering done - look for the recombine batch file and manually double click - it will recombine.
Also panoramas - but I see you are using exr and I'm pretty sure imagemagick will not recombine them - but give it a go...
If exr files cannot be composited - you will need to do that by hand in some unknown image editing program.
Its possible the pano will be made properly as the latest hugin does recognise exr files but not sure if it will work...
its late here in NZ - good luck, good night