Need help with regular expression

Hi, all. I've been searching for an easier way to edit the screwed up Title ID3 tags of Newgrounds audio downloads. My regex seems close, but it's not matching. Could someone point out my error? Here's a sample of the formatting of the title tag:

Rig - Moar (ID: 3034203)

Regular Expression:

Replace with:

EDIT: Sorry that this is a new topic. I meant it as a reply to the existing stickied thread.