after disconnect the hard drive

I put a new hard drive in without change the jumper to "slave", but when I disconnect it from the computer, just left the old HD, the computer can't boot to window.

When I went in the bois, it show" primary IDE master and slave not detected".

when i ture on the computer, after the logo, it come out a message:

"reboot and select proper boot device or insert boot media in selected boot device and press a key".

What can I do for this? Thanks!