Problem inserting discs into iMac

Open "Disk Utility" and see if it recognizes the Superdrive. Try restarting the iMac while holding the mouse button during restart (causes eject action). Reset PRAM:

PRAM RESET

• Shut down the computer.
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Hold the keys down until the computer restarts and you hear the startup sound for the second time.
• Release the keys.

i have this issue and tried this and it didnt work