accessing TRECK directly

I have an application where the Connect ME will send a file via FTP transfer to an FTP server. I do not see a way in the FTP client libraries to rename the file on the server once I transfer it. Does anyone have any experience doing this? I am using NET OS 7.4. I see that TRECK supports it with a call to tfFtpRename() but there is no Digi library function to this TRECK routine. I tried calling it directly without any luck. The first arg is a pointer to the session, while Digi libraries use an int session #.

You have to download the file, delete the file, and then upload it again with the new name