Soryy if this is the wrong help but if it's not downloading , at the place on the website were you write the link of the download , Test to add a 1 , and take away the 0.
THis only works at dropbox . Example: Your link to the modpack file is: https://www.dropbox.com/s/rlog08b1m2x2kay/ekore kille.jpg?dl=0
Just change the 0 to an 1 so it looks like this : https://www.dropbox.com/s/rlog08b1m2x2kay/ekore kille.jpg?dl=1
Sorry if this is wrong help-thing
But it can also be that u need to change the forge files name to modpack.jar .
Sorry If this is wrong help-thing.