Vim Ultisnips - How do I move to the next placeholder or tabstop?

Question

I just installed a brand new copy of Macvim and UltiSnips, but I can\'t figure out how to move to the next completions using tabstops and placeholders.

When I press tab,

Answer 1

I have the following in my vimrc:

" Set ultisnips triggers
let g:UltiSnipsExpandTrigger=""                                            
let g:UltiSnipsJumpForwardTrigger=""                                       
let g:UltiSnipsJumpBackwardTrigger=""