error booting kali on usb drive

[mohit prajapat]

am using unetbootin on compaq laptop transcend pendrive...
i get this screen
Default
Back
Live (forensic mode)
Install with speech synthesis
Hardware Detection Tool (HDT)
However, I can't boot into any of these; when i select default this
happens:
Segmentation fault at address 0xb7200000
Fatal server error:
Caught signal 11 (Segmentation fault).
Server aborting.
Please consult The X.Org Foundation
support
at http://wiki.x.org/
for help
Please also check the log file at "/var/
log/Xorg.0.log" for additional
information.
Server terminated with error (1). Closing
log file.
(debconf:4384): Gtk-WARNING ##: Cannot
open display: 0

what is the exact problem
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