Tried it and I still couldn't get it to work. Could you give me an actual line from a demo you know works?
This is what I tried:
0 4999 chat 45 0 "<t=8 caption x=0.5 y=0.2 d=7><scale 1.75><color White><bgcolor MidnightBlue>An hour ago, the Tyrant's Palace Casino was robbed by a team of four professionals."