ok, it seems to work :-) thank you.
but I was a little confused about ClientFileName, cause this is only to find "upload files". If I take the simple FielField it works.
So, always I want to check something in the upload I take the ImageAttributes in my FORM?
What are the UPLOAD FILES attributes for? There are also 2 diffrent attributes (see server files2.jpg).
Thanks for your help!