I Downloaded V7.0.3-DVD.iso and ran the md5sum integrity test.
Then I burned image to DVD and wanted to make an USB Flashdisk Installation.
When it says "Creating Boot Record on /dev/sdh" I got the Error message:

lseek: Invalid argument

sfdisk: seek error on /dev/sdh - cannot seek to 0
/dev/sdh: unrecognized partition table type

sfdisk: 1: no such partition
What is wrong? How can I fix it?

PS.: I use a 32GB HP USB drive which I formatted FAT32 first.