Using the VaZmodem Protocol

I am connecting to the Novitas BBS, Smart Xfer system. and when downloading a file using the VaZModem protocol the OnTransferEnd event never fires eventhough we have received the file. 

 
What are the properties that I should try to change that would affect how the protocol determines when the files has completed?  There are no issues uploading.
 
Thanks,
Robb