Go to Digital Performer>Preferences. Select ‘Audio Plug-ins’. Does the plug-in show up here? If it does, check the following things:

• Does it say ‘Passed’ or ‘Failed’ to the right of the plug-in name? If it says ‘Failed’, try re-examining the plug-in. Select the plug-in name, then select the ‘Reexamine’ button. It should now say ‘Passed’. If it still fails examination, then there’s an issue with this plug-in. In this case, check for plug-in updates, reinstall the plug-in, and contact the plug-in developer to report the issue.
• If the plug-in says ‘Passed’, look at the checkbox to the left of the plug-in name - is it checked? If not, check it. This should resolve the issue.

If the plug-in doesn’t show up in the Audio Plug-in window, there are a couple of possibilities:

• The plug-in installation was unsuccessful or corrupt. Double check that it is the most recent plug-in version, then try reinstalling.
• The plug-in is incompatible with DP’s current mode of operation (32-bit or 64-bit). We sometimes see this with older plug-ins that are 32-bit only - as DP runs in 64-bit mode by default, any plug-ins that are 32-bit only will not be accessible. To confirm this, either launch DP in 32 bit mode* to check whether the plug-in appears or contact the developer to verify the plug-in’s compatibility.

*To run DP in 32-bit mode, select the DP application in Finder, then go to File>Get Info. Select the checkbox for ‘Open in 32-bit mode’.