TFTP Server - invalid access for Cisco LD

I am installing the Cisco LocalDirector for balancing across several webservers. BUT, the TFTP server gets an error of "Invalid access to <file dir/name>". The LD is talking to the TFTP server; I created a file with the appropriate name; made sure the default directory on the LD is set up the same as the TFTP server; made sure the security was set to everyone and full access.

Any suggestions as to what is causing this?

thanks

John Johnson
SINS Project