How to make formatted flash drive found?

[joe at actionline.com]

> you try mounting it?

Yes.  It mounts automatically  when the drive is inserted.
And proof that it is properly mounted is shown by the fact
that I can copy files to it and from it.

Also, fdisk -l finds and shows the device:
>>   Device Boot      Start         End      Blocks   Id  System
>> /dev/sdb1   *          32     7821311     3910640    b  W95 FAT32

However, when I try to run 'unetbootin' it states: "No USB drive is found."

I have tried umount and reformatting it, both of which work fine.
So how can I get 'unetbootin' to find it?

---------------------------------
> On Sat, Sep 3, 2011 at 10:48 PM,  <joe at actionline.com> wrote:
>> What do I need to do to get my system to "see" a formatted USB flash
>> drive?
>>
>> After inserting a USB flash drive, as root, 'df' shows this:
>> Filesystem            Size  Used Avail Use% Mounted on
>> /dev/sda1              12G  2.6G  8.7G  24% /
>> /dev/sda6              23G 1001M   22G   5% /home
>> /dev/sdb1             3.8G  4.0K  3.8G   1% /media/disk
>>
>> And fdisk -l shows this:
>>   Device Boot      Start         End      Blocks   Id  System
>> /dev/sda1   *          63    25189919    12594928+  83  Linux
>> /dev/sda2        25189920    78156224    26483152+   5  Extended
>> /dev/sda5        25189983    31230359     3020188+  82  Linux swap /
>> Solaris
>> /dev/sda6        31230423    78156224    23462901   83  Linux
>>
>> Disk /dev/sdb: 4004 MB, 4004511744 bytes
>> 116 heads, 51 sectors/track, 1322 cylinders, total 7821312 sectors
>> Units = sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disk identifier: 0x00000000
>>
>>   Device Boot      Start         End      Blocks   Id  System
>> /dev/sdb1   *          32     7821311     3910640    b  W95 FAT32
>>
>> But when I try to run 'unetbootin' no USB drive is found.