[U-Boot-Users] tftpboot question

Hi all, and sorry for disturbing you again. I'm trying to load an image from a tftp server using tftpboot. Server is reachable, and running. Address of image is correct. U-boot contacts the right IP, then tries to load the image and intead of printing "#" as documented, prints "T" (it means timeout I suppose). But I continue getting an error message: "Retry count exceeded" Then the procedure starts again.

What this behaviour can depend from? I excluded tftp configuration problems and network problems.

Thanks in andvance