Resolution:
To run a .NET Driver from an Engine Service, you must first deploy the driver.properties file to the Engine, and then configure the Engine to use the new file. To do this:

   1. In the GridServer Administration Tool, on the Services page, go to the Resource Deployment page.
   2. Navigate to the resourcessharedconfig directory.
   3. Click Browse and find your copy of the driver.properties file from the GridServer SDK, then click Upload.
   4. On the Engine tab, go to the Engine Configuration page.
   5. Select the configuration that your Engines are currently configured to use or create a new one. If you create a new configuration remember to change the Engines to use that configuration before you test.
   6. In the configuration editing screen there will be a section called Properties. In the Environment Variables section, change the value of DSDRIVER_DIR to .resourcessharedconfig.
   7. Click Save.