vbscript to gather windows cluster information

I have a script that i have created below which is intended to grab microsoft cluster information. I hacked it together from fragments on the net, but I am having trouble nailing down the logic. I'm sure its some vbscript issue that I just don't understand.

I supply a cluster name, and the script is suppose to collect all the groups from that cluster and store it in an array. For some reason it keeps inserting a blank group into the list of groups. Why is that?
My end result is to get a script that collects all the groups of a cluster, denotes their owner, and their status (online, offline, or partially online)

I've attached what I have so far. To begin in just need to figure out the storing of the cluster groups issue.
Thanks

strClusterName = "FOSsudXV1"
 
Set objWMIService = GetObject("winmgmts:\\" & strClusterName & "\root\MSCluster")
 
Set colItems = objWMIService.ExecQuery("Associators of {MSCluster_Cluster.Name='" & strClustername & "'} WHERE AssocClass = MSCluster_ClusterToNode")
state = "ONLINE" 
Dim ClusterGroups()
ClusterGroupSize = 0
Function checkGroupExists(astr)
	for each grp4 in ClusterGroups
		if (trim(ucase(grp4)) = trim(ucase(astr))) then	
			checkGroupExists = true
			exit function
			msgbox ucase(grp4) & " *-EXISTS* " & ucase(astr)		
		else
			
		end if
	next
	checkGroupExists = false
	exit function
End Function
 
Function addGroup(astr)
	if ClusterGroupSize > 0 then
	ReDim tempArray(ClusterGroupSize)
	counter = 0
	For each grp1 in ClusterGroups
		tempArray(counter) = grp1
		counter = counter + 1
        next
	end if 
 
	redim ClusterGroups (ClusterGroupSize + 1)
 
	counter =0
	if ClusterGroupSize > 0 then
	for each grp2 in tempArray
		ClusterGroups(counter) = grp2
		counter = counter + 1
        next
	end if
	
	clusterGroups(counter) = aStr 'assign the last member
	ClusterGroupSize = ClusterGroupSize + 1
End Function
 
For each objitem in colItems
 
  output = ""
  output = output & objItem.Name & Vbcrlf
 
  Set colAGItems =  objWMIService.ExecQuery("Associators of {MSCluster_Node.Name='" & objitem.Name & "'} WHERE AssocClass = MSCluster_NodeToActiveResource")
 
  For each objAGItem in colAGItems
    Set GROUPS =  objWMIService.ExecQuery("Associators of {MSCluster_Resource.Name='" & objAGItem.Name & "'} WHERE AssocClass = MSCluster_ResourceGroupToResource")
    'output = output & "*" & objAGItem.Name & "*" & ": " 
    'output = output & objAGItem.State &  ": "
    For each GRP in GROUPS
      if (checkGroupExists(GRP.Name) = false AND GRP.Name <> "") then
	'msgbox ("adding" & grp.name)
	addGroup (GRP.Name)
      end if
      'msgbox GRP.Name
      exit for
    next
    output = output & Vbcrlf
  Next
Next
 
for each gp in ClusterGroups
	msgbox gp
next

Select allOpen in new window