Object reference not set to an instance of an object.

Hi guys,

 i am facing the one problem when i export the process in to the K2 server.

the problem is :

                      Compiling Claim_DE...
                      Claim_DE compiled successfully

                        Exporting to enzenk2...
                       Object reference not set to an instance of an object. 

    enzenk2 is the server name,claim_DE is the process name.

  i give the server registration as per given below;

                      right click on the project----> select the properties---->select the export servers---> click the add button--->

                              select external authentication---->

                                 connection string:  ;];Authentication=External;User=Administrator;Password=  --->ok

      these are all successfully compiled the process,but when i exporting the process in to the server,the above error is occured.pls find the problem.and give me suggestions,where i modified.

thanks,

schand