In the future, it's best to start a new topic when reporting an issue - that helps other users find it in the search results and often the information in a year old thread is too old to be relevant anymore. Any new response can get accidentally buried in a long conversation thread like this.
The texture isn't loading because the /js code is too long - there's a character limit. Right now, the way to shorten the /js code when running a texture is to: shorten your learntomod nickname or shorten the title. I can do that for you if you like.
The /js code for this texture is: /js self.setResourcePack('http://mod.learntomod.com/editable_image_groups/balthatrix-Jehkobas Fantasy.zip') and when I run it, the y.zip') is cut off because of the character limit.
You could try making a mod out of it instead and see if that works.