i need my old emails back

I had em client on my old computer that crash along with my save emails. I purchased new computer and retrieve original em client activation key but notice all my emails from before we not there. how can i retrieve them?

if your emails were stored at server (through IMAP) just set up your email account and it will download emails from server (during Send and receive process).
If not, try to recover eM Client database directory from your old computer. It’s located at C:\Users[YourUsername]\AppData\Roaming\eM Client (if you use Vista and higher) or at C:\Document and Settings[YourUsername]\Application Data\eM Client (for XP). Place it at the same place (again depending on your operating system) at your new computer.