Problems adding new disks to a Virtual Machine using datastorageClusters

The first question I have is it possible to add a disk using a different datastoreCluster than was used when the VM was cloned from template? Does it require a particular affinity to be set up?

Basically I'm getting the following: java.rmi.RemoteException: VI SDK invoke exception:com.vmware.vim25.InvalidRequest

Here is most of my code, any help would be appreciated. Ultimately I would like to create a number of different disks on different pods for this one vm if that is possible.

  // Create a StoragePlacementSpec

      StoragePlacementSpec storageSpec = new StoragePlacementSpec();

      // Set type to reconfigure

      storageSpec.setType(StoragePlacementSpecPlacementType.reconfigure.name());

      // Add the virtual machine to the storage spec

      storageSpec.setVm(vm.getMOR());

      // Create a pod selection spec

      StorageDrsPodSelectionSpec podSelectionSpec = new StorageDrsPodSelectionSpec();

      // Create a VirtualMachineConfigSpec

  VirtualMachineConfigSpec configSpec = new VirtualMachineConfigSpec();

  // Code for configuring the new disks.

  VirtualDeviceConfigSpec[] deviceChange = new VirtualDeviceConfigSpec[virtualDisks.size()];

  for (int i=0; i<virtualDisks.size(); i++) {

  VirtualDisk virtualDisk = virtualDisks.get(i);

  Integer diskSizeGB = virtualDisk.getSizeGB();

  // Create a VirtualDeviceConfigSpec

  VirtualDeviceConfigSpec diskSpec = new VirtualDeviceConfigSpec();

  // set this disk Spec into the array of changes

  deviceChange[i] = diskSpec;

  // Create a backing object

  VirtualDiskFlatVer2BackingInfo backing = new VirtualDiskFlatVer2BackingInfo();

  // Set the Disk mode to persistent

  backing.setDiskMode(VirtualDiskMode.persistent.name());

  // Create a new vmware VirtualDisk

  com.vmware.vim25.VirtualDisk vDisk = new com.vmware.vim25.VirtualDisk();

  // Set the backing object

  vDisk.setBacking(backing);

  // Set the capacity

  vDisk.setCapacityInKB(diskSizeGB*1024L*1024L);

  // Find and set the Virtual Disk key

  int key;

  key = getNextKey(usedKeys);

  vDisk.setKey(key);

  virtualDisk.setDeviceId(key);

  // Set the Virtual Disk as the device

  diskSpec.setDevice(vDisk);

  // Set Operation and File Operation as add and create

  diskSpec.setOperation(VirtualDeviceConfigSpecOperation.add);

  diskSpec.setFileOperation(VirtualDeviceConfigSpecFileOperation.create);

  }

  // Add the changed devices to the VirtualMachineConfigSpec

  configSpec.setDeviceChange(deviceChange);

  // Add the VirtualMachineConfigSpec to the StoragePlacementSpec

  storageSpec.setConfigSpec(configSpec);

  // Create a array for Initial VM Config, not sure if this is necessary or not

      VmPodConfigForPlacement[] initialVmConfigArray = new VmPodConfigForPlacement[dsClusterMap.size()];

      int i = 0;

      // For each datastoreCluster

      for (String datastoreClusterName:dsClusterMap.keySet()) {

      // Create a VmPodCOnfigForPlacement object and assign it to the array.

      VmPodConfigForPlacement initialVmConfig = new VmPodConfigForPlacement();

      initialVmConfigArray[i++] = initialVmConfig;

      // Set the storagePod for this disk

      initialVmConfig.storagePod = dsClusterMap.get(datastoreClusterName).getMOR();

      int numberOfDisks = dsClusterToDiskMap.get(datastoreClusterName).size();

      // Create a array of PodDiskLocator objects for each disk targeting this storagePod

      PodDiskLocator[] disks = new PodDiskLocator[numberOfDisks];

      int j=0;

      // For each disk, create a PodDiskLocator, add to the array and set the DiskId, VirtualDisk key

      for (VirtualDisk virtualDisk:dsClusterToDiskMap.get(datastoreClusterName)) {

      PodDiskLocator disk = new PodDiskLocator();

      disks[j++] = disk;

      disk.setDiskId(virtualDisk.getDeviceId());

      disk.setDiskMoveType("");

      }

      }

      podSelectionSpec.initialVmConfig = initialVmConfigArray;

      // Set the podSelectionSpec.storagePod to the pod of the first disk

  String datastoreClusterName = virtualDisks.get(0).getDatastoreCluster();

  StoragePod storagePod = dsClusterMap.get(datastoreClusterName);

      podSelectionSpec.setStoragePod(storagePod.getMOR());

      // Add the podSelectionSpec to the StoragePlacementSpec.

      storageSpec.setPodSelectionSpec(podSelectionSpec);

      StoragePlacementResult storPlaceResult = null;

      // End: RecommendDatastores

  try

  {

  storageSpec.setFolder(datacenter.getVmFolder().getMOR());

  storPlaceResult = srm.recommendDatastores(storageSpec);