Problem to reinstall thin client T620

I try to reinstall WES7P-64 with Thinupdate.

But when it boots from the USB media I get this error:

Couldn't open WIM file!" R:\xxxxxx

I tried several times and write the usb memory again with Thinupdate.

But same error.

I use a brand new 32 GB usb memory. It cannot be something wrong with that.

Any ideas..?