How to write to a PLC Simatic S7-300 via HMI Adapter from Labview

Has someone tried to write from Labview 6.0 via a Siemens HMI Adapter to a DB on a Simatic S7-300 CPU.
I am only able to read. Trying to write comes the message from the OPC server: Protocol error, NO response from PLC

Greetings!
   Thanks for the post. Please check the following.
   1) Did you try connecting with server explorer and see if you are getting a response from the PLC
   2) Also please refer to the following links which will help you on further programming
    http://digital.ni.com/public.nsf/websearch/3F0B1B7C1E80FC3286256738007EED39?OpenDocument
    http://digital.ni.com/public.nsf/websearch/F92C1F2F7B35105B86256DB200628B24?OpenDocument
    http://digital.ni.com/public.nsf/websearch/9FAE59C3B902458B8625672400651A2E?OpenDocument
   3) Is this the first time you are talking to the PLC , or
did it just happen and if it did was there something that changed
Do you have any vi built and testing. The links above have example programs you could use.
Thanks much and hope this helps.
Best regards
Avi Harjani

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