Asterisknow on usb

Installing Asterisknow on USB drive gives a Popup saying it can not create boot partition on the usb drive.

Any solution??

I managed to install Asterisk on usb drive by selecting “remove old partition” in the install option.
Installation finished succesfully…
But starting from usb says “Error loading Operating System”.

Anyone experienced installation and running Asterisk on USB???!!

I’ve been running asterisknow on a OCZ Rally2 USB key for over a year and a half. No problem. You MUST let the installer obliterate any hint of a prior Windows partition or MBR by letting the CentOS installer use the whole USB drive and deleting all existing partitions.