[U-Boot-Users] About the u-boot (in ELF binary format)

Hi, I have successfully compiled u-boot and ,as you know, there are several object files produced after"make all", one of which is u-boot(in ELF binary format) . Now, i run the u-boot(in ELF binary format) in target board (Embedded Planet EP405)with Linux kernel and NFS file system. # ./u-boot then appears the error echo: Segmentation fault will you please tell me what's the problem and how to solve it? Thank you and best wishes!!