No profile is going to help you with Ultraflex. With Ultraflex banner media the plasticizers come to the surface and cause problems with Latex ink. Use something else or whip it down with alcohol.
on my 360 I am using the Ultraflex Ultma Pro profile for Ultraflex Super Print 13 oz banner. It prints perfectly!
I have to assume that the profile you are using is not letting your inks cure properly.