Remove the path from ttf file so it's "001,arial.ttf", I've done it and works.
Also a suggestion, define yourself a pack of current used text styles and name them, 808 in help gives examples, and just copy/paste them into inp/mcm files and use them with "808,3=STYL" where "STYL" is your current defined text style. Consistent results every time, that's why we use MX (linemode), except when it raises hair.
Have fun,
Val.