Error creating a SessionMgr

[bluecjh]

visual studio 2003/ BO xi

Dim myEnterpriseSession As EnterpriseSession
Dim mySessionMgr as SessionMgr

mySessionMgr = Serverr.CreateObject("CrystalEnterprise.SessionMgr")

i get "Specified cast is not valid."

If on the hand i try

        Dim mySessionMgr As SessionMgr = New SessionMgr

it get the error
"COM object with CLSID {44B5A31B-5831-40A2-ACD6-DB62832131DF} is either not valid or not registered"

i'm falling at the first hurdle, does anyone have a clue?

many thanks

BlueCJH