anyone know how to recover deleted files?

[jason at ec.rr.com]

I have tryed rescuemagic but am getting this error:

magicrescue -d /mnt -r jpeg-jfif -r jpeg-exif  /dev/ad4s1f
Read error on /dev/ad4s1f at 102400 bytes: Invalid argument

magicrescue -d /mnt -r jpeg-jfif -r jpeg-exif /usr/home/jason
Scanning /usr/home/jason finished at 0MB

Any suggestions?

Thanks,
Jason