how to recover lost partition

#1 done., switched the drive to slave but I've lost some partitions.How do I recover it back ? ( if possible ) Using ' disk management' it did said there is 76.3 GB on the disk but only the first partition ( 31 GB ) is to recover the rest ? Tried using Partition Magic to do it but it says ' bad parameters ' ....If I could only retrieve back all the files in there....
refer to my first thread :


Mentally Absent
this is the reason i find it pointless to set up multiple partitions on a drive, if the drive fails, you still loose data, nothing beats multiple hard drives.