You have to be sure the drive is jumpered correctly. Most drives have a little chart on them describing how to arrange the jumpers for Master or Slave mode.
You cannot have two masters or two slaves on the same cable.
Also, most hard drives have a different jumper setting for Master (w/ Slave Present) and Single (Master w/out Slave present). If your HDD is the only drive on its chain, double check to make sure it is set as "Single", not Master.
If you still have problems, tell us which drives are on which connector on which cable and how they are jumpered.
__
0100000101001100010011000101100101001111010101010101001001000010 0100000101010011010001010100000101010010010001010100001001000101 0100110001001111010011100100011101010100010011110101010101010011