Hi dre99gsx,
I can't see your code since I am using Labview 8.0.
I have attached the SDO WRITE example code for your reference. You say that you have used the module control at the end.The better way is to use this at the starting and setting it to either Pre-operational or Operational as SDO works in both.
The problem you may be facing is that,module control command you have given might not be proper,you may not be closing it at the end.
Please let me if I am wrong anywhere or in the code attached.
SDO create example.png:
http://forums.ni.com/attachments/ni/30/3099/1/SDO create example.png