Vinux with Voxin

[Lenny]

Hi,
I have been installing Vinux onto a thumb drive, an 8GB thumb drive.
Every time I try to install Voxin, it will sometimes act like it installed 
okay, and other times, the Voxin does not install, in fact, the speech goes 
out in the middle of the install.
I have tried it using the USB install, using their USB installer program.
This is the stable version, using Ubuntu 10.04.
I have tried both Voxin 0.37, and Voxin 0.41.
Is there a reason that it would not install onto a thumb drive?
I downloaded the CD version, and although it was too big to overburn onto my 
700 MB CDs, I burned it onto a DVD, and it runs okay.
With the USB version, it will boot okay, and I can change Orca's voice 
settings, but as soon as I then go into installing Voxin, it quits working.
I have tried a 2GB persistence, as well as a 3GB and a 4GB.
The way I install Voxin is to copy the extracted folder into /home/ and then 
I go into terminal, and after running sudo su, I run:
bash voxin-installer.sh
and that normally works well, but I haven't gotten it to work on this thumb 
drive.
I am running a more recent version of Vinux in a netbook as a dual-boot 
system, and Voxin works well on that system.
I have used this Voxin with Ubuntu 10.04 as well.
So it seems to me that it is the thumb drive.
Any ideas?
Glenn