[syslinux] Loading plpbt.bin from Syslinux 4.02 causes reboot

[mwesten]

Hi,

I'm trying to setup a flash drive with Syslinux 4.0.2, ifplop.c32, and 
plpbt.bin (5.0.10) as shown in the thread here: 
http://forum.plop.at/index.php/topic,165.0.html

Unfortunately, the system reboots as soon as I load plpbt.bin from Syslinux.

I don't think it's a problem with plpbt.bin because it works if I boot 
Grub4DOS and load it.  : (
It will also work if I boot Syslinux, load grub.exe, and then have that load 
the same plpbt.bin.

Help...

-Mike