hi all
i am new to backtrack forums,i have read the forums section regularly,and i face the following problems
i recently downloaded backtrack r2 iso 32 bit from backtrack website,i used the ultraiso tool to make my usb bootable and to install back track in it,then i as usual i booted from my usb drive at startup
when i boot up the blank screen appears and after sometime it says "press tab to access menu" but when i press tab key ,my laptop beeps longer and no further booting at all ,please help me in installing backtrack r2,
my laptop configuration is as follows
intel dual core processor
2gb ram
512 mb nvidia geforce graphic card
please guide me in solving my issue,and to install r2 i refered forums section and the website for my query but i cant find anything so i post it in forum

Thanks in advance