Problems trying to run from a Live USB

I have followed the instructions from  https://wiki.ubuntu.com/LiveUsbPendrivePersistent - as well as a few other sites, which all said basically the same thing, in an effort to install Linux on my USB drive in a way that I could boot from it. I think I have done everything correctly - partitioning, formatting, copying the files from the LiveCD, running syslinux... etc. I did all of that, and then put my USB drive into another computer, and tried booting from it. I got the normal Ubuntu Live CD-ish menu, and tried starting Ubuntu. The ubuntu logo and loading bar come up, and it seems to be loading or doing something for a while, and then it just stops, and I am left with a black screen and a small blinking white underscore-type cursor at the top-left of the screen. No combination of keys can let me out (i've tried ctrl+alt+del, ctrl+alt+1, ctrl+alt+7, etc.).   Do you have any ideas as to why this is happening, or what is going on?  I'm relatively new to Ubuntu, and Linux in general - a while ago, I managed to partition my Vista box and install Ubuntu on that so I could dual-boot, and that has been working fine. I just can't seem to get my usb drive to work like a Live CD.  Any help would be appreciated.  Thanks! 

Live USB - for lack of a better name

You need UNetbootin (download from http://unetbootin.sourceforge.net) and an iso image of whatever live cd you want to transfer to USB flash drive(download from ubuntu.com,as an example :-)You can do it from Windows or linux ,as UNetBootin has versions for both OSes.It can turn your flash drive into a LiveUSB,or can install an Ubuntu(or whatever) system to the usb drive...hope this helps.

Hmm.... I had read about

Hmm.... I had read about UNetbootin, but wanted to do it manually ( I know it is possible, my friend did it a while ago, and there are multiple tutorials). I have the actual LiveCD in my computer now, so when I was trying to make the USB work, I partitioned and formatted it, copied the files from /cdrom to the /ubuntu partition on the USB, renamed isolinux to syslinux, edited the syslinux.cfg file, and ran syslinux.

I meet the same problem

I have made a liveusb ubuntu use the same method, and the usb works well on my computer.But when I use it in our classroom's computer then it don't work and stoped in the loading bar.

I meet the same problem

I have made a liveusb ubuntu use the same method, and the usb works well on my computer.But when I use it in our classroom's computer then it don't work and stoped in the loading bar.

I meet the same problem

I have made a liveusb ubuntu use the same method, and the usb works well on my computer.But when I use it in our classroom's computer then it don't work and stoped in the loading bar.