I am having trouble in installing bt5 from my pen drive, after selecting the pre formatted(by windows 8) partition from advance option, the setup crashes.

**************ubi-usersetup crashed***************
ubi-usersetup failed with exit code 10.Further
information may be found in /var/log/syslog. Do you want
to try running this step again before continuing ? If you
do not, your installation may fail entirely or may be

Continue anyway
try again

I am having 1000 mb for swap area and 20067 mb for backtrack partition(ext4 format)

Please tell me where am I doing wrong or what is the actual problem and one imp thing guys I am very new to forums as well as Linux environments So plz answer in simple ways