Dash Ultra/'s

I’ve started playing Dee Jay lately and I’m use to playing Ryu, I’ve played around with a few characters but the only charge character I really played around with was Vega (aside from trials). Anyways, I can’t seem to get just a normal dash ultra out at all, I’ve got input on and all the right motions are coming out but nothing comes out, am I just doing the input too slow?

The input I’m using is :
:db::r::hcb::ub::3p:

http://shoryuken.com/f332/deejays-midscreen-ex-mgu-dash-ultra-2-combo-233758/

Yeah, I had read all of that, but I did just see something in it I think I might of missed, I’m going to go try again.

Though I don’t know when you’re inputting the ultra, I think you might be hitting it too early. you can buffer everything during his dash, but you gotta wait til he’s standing to hit 3P or 3K.