I'm assuming you have the English patch for UTAU, yes?
Go to Edit & hit Select All Notes.
Then right-click on any note, go down to Region Properties, & in the box that pops up, hit the Clear button, & make sure the STP space isn't grayed out. (The STP space appears when you hit Details at the bottom of the box). If the STP is grayed out, just put your cursor there & press the space bar.
Hit OK, then in your right hand corner (not all the way in the right xP) there are 4 buttons. Hit the one that says P2P3 & afterwards hit the one that says ACPT. This crossfades the envelopes into each other.
Then, go through the UST & make sure there aren't any exclamation marks over any notes. If there are, right-click on the note, go to Envelope, & press the middle button in the box that pops up. If the middle button doesn't fix anything, press the right button.
Congratsss, you fit the UST to your UTAU >.<
I can look at the OTO for you if you'd like, unless you wanna fix it yourself. Use some other banks you have as guides.