Logic Pro 7.2 does not work under DAE/TDM with ProTools 6; DAE/TDM stops working after upgrading to Logic Pro 7.2.
For technical reasons, you can't run DAE/TDM with Logic Pro 7.2 and ProTools 6. If you are running a ProTools HD or HD Accel system, upgrading to ProTools HD 7 will resolve the issue. If you have earlier ProTools hardware that does not work with ProTools HD 7, then you will need to reinstall Logic Pro 7.1 from the original disc and use that version with DAE/TDM.
Before reinstalling, you need to delete the file /Library/Receipts/Logic Pro.pkg. You might also want to rename the Logic Pro 7.2 application to prevent it from being overwritten when you reinstall Logic Pro 7.1.
For more information on ProTools hardware compatibility, see the Digidesign website.