ObjRst.pagecount Returns -1 StoredProcedure

I'm writing an ASP page calling stored procedure from my database, in which I used Command Object. However, I can't get the pagecount or recordcount by the command: objRst.pagecount or objRst.recordcount since it returns -1, which, from the documentation, means these methods are not supported for some strange reason.
I'm thinking maybe it's becasue I used the Command Object with stored procedure. However, if I put my sql query into a string and then open it from a connection obj, the pagecout method would work fine.

The code is as follow:
====================
dim param
... ...
Set objConn = Server.CreateObject("ADODB.Connection")
Set objCmd = Server.CreateObject("ADODB.Command")
set objRst = Server.CreateObject("ADODB.RecordSet")

objConn.Open strLogin
objCmd.ActiveConnection = objConn
objCmd.CommandText = "test.my_procedure.method1"
objCmd.CommandType = 4

objCmd.Parameters.Append objCmd.CreateParameter("param", 200,1,50,param)
set objRst = objCmd.Execute
objRst.CursorLocation = adUseClient
'objRst.Source = objCmd [NOT SURE IF CORRECT, so cmt out, but doesn't affect my question]
objRst.CursorType = adOpenStatic
myrecordcount = objrst.PageCount [RETURNS -1 !! :confused: ]


======================================