Unable to open VM image

I'm running VMWare ESX server 4.0, and want to automate testing on several major Windows OS' using VIX 1.10. Started off by downloading VIX 1.10, and putting the VI-Server-2.0.0 dlls into my classpath. When i call VixVM_Open after a connect, it returns error 4000 : VIX_E_VM_NOT_FOUND. This seems strange, considering that the event monitor in the vSphere client reports:

Find virtual machine by datastore path

Completed

root

9/13/2010 11:23:02 AM

9/13/2010 11:23:02 AM

9/13/2010 11:23:02 AM

And shows a green tick indicating the process has gone through successfully. As a result of this failed step, i have no vmHandle to perform guest operations in the VM. Any ideas on why this could be failing to find the vmx path specified. I know for sure it does exist. Thoughts ?

Here is the sample code of my openVM method ...

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        jobHandle = VixGuest.instance.VixVM_Open(hostHandle[0], vmxPath, null, null);

        result = VixGuest.instance.VixJob_Wait(jobHandle, VIX_PROPERTY_JOB_RESULT_HANDLE, vmHandle, VIX_PROPERTY_NONE);

        if (result != VIX_OK) {

            log.error("Error in opening VM: " + result);

        }

        VixGuest.instance.Vix_ReleaseHandle(jobHandle);

        return vmHandle;

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FYI, I'm developing the implementation of the VIX API in Java.