You have purchased songs on your itunes account from 3 different computers and you want them to play all the allowed access new computer but still cant old purcha?

To access your iTunes purchases on a new computer:

1. Open iTunes on your new computer.

2. Sign in to your Apple ID.

3. Click on the Account menu and select Authorizations > Authorize This Computer if prompted.

4. Once your computer is authorized, you can access your purchased music by clicking on the Music tab and then selecting Purchased from the left sidebar.

If you are still unable to access your purchased music, you may need to deauthorize your old computer:

1. Open iTunes on your old computer.

2. Sign in to your Apple ID.

3. Click on the Account menu and select Authorizations > Deauthorize This Computer.

4. Once your old computer is deauthorized, you should be able to access your purchased music on your new computer.

Note: You can only authorize a limited number of computers to play your iTunes purchases. If you reach your limit you can deauthorize all computers and reauthorize the ones you want.