After starting the FS2004 for another flight the following warning was showed " PMDG sound Processor" in the headline and as text "Error initializing Direct Sound. Application will now exit."I reinstalled the PMDG 737NG. But invane. The error box is still there. Who has the solution?

After starting the FS2004 for another flight the following warning was showed " PMDG sound Processor" in the headline and as text "Error initializing Direct Sound. Application will now exit."I reinstalled the PMDG 737NG. But invane. The error box is still there. Who has the solution?

You need to sign your posts per forum rules, have you tried reinstalling your sound drivers. Also make sure you have the latest versions. If that doesn't work, open a support ticket with PMDG.