I put together a dvd using a no. of avi clips including divX clip & the total length was 186 mins. I burnt it with menus & at high quality. No problems. Which astounds me why you can't get yours to work. Yours is only 101 mins.

You could try saving it as a disk image & then burning as an image file. Load the video, then hold apple & D keys. Then after video conversions & image file creation, you would go to Copy tab, select advanced button & select Disk Image. Then load the disk image & burn. Make sure the image file is 4.37 GB or less in size!!!

If you haven't already, update to Toast 6.0.9 there's some bug fixes & an improvement in the video conversion codecs used.
By the way I used to use TDK but found they're not as reliable as Verbatim.