Delegate problem. plz help. its urgent.

[Atif Ali Bhatti]

i m using delegates in vb.net. invoking delegate generates an error tht object refrence not set to an instance at the following line. _delUpdatetext.DynamicInvoke(aObj) where _delUpdatetext is a defined as follows. Private _delUpdatetext As System.Delegate hope i get help soon... thnx in advance.