OMI API errors Trouble with sendNotification service

I installed fix 6, 7, and 8 for the wM Manager Server (installed on individual IS servers as needed). I am trying to use the API, however I get the error when I run the error with or without inputs. When I create a wrapper service I get the error: java.lang.ClassCastException when I run the service with inputs.

If I compile the the service, I get the following errors:

/appl/webMethods/IntegrationServer/packages/WmOmiIs/code/source/omi/wm/is/ Class com.wm.ism.OmiMBeanServerImpl not found in import.
import com.wm.ism.OmiMBeanServerImpl;
/appl/webMethods/IntegrationServer/packages/WmOmiIs/code/source/omi/wm/is/ Package omi.wm.devkit not found in import.
import omi.wm.devkit.;
/appl/webMethods/IntegrationServer/packages/WmOmiIs/code/source/omi/wm/is/ Package com.wm.ism not found in import.
import com.wm.ism.
/appl/webMethods/IntegrationServer/packages/WmOmiIs/code/source/omi/wm/is/ Package not found in import.
/appl/webMethods/IntegrationServer/packages/WmOmiIs/code/source/omi/wm/is/ Class com.sun.jdmk.Trace not found in import.
import com.sun.jdmk.Trace;

I have IS and Manager server 6.01, and IS SP1 installed. Has anyone got the OMI API to function correctly, or at least run without blowing up.

Any help or advice on this would be great.