TFTP Server Timeout issue

Hi,
I'm running CentOS 5 as guest using VMware player. My host is Windows Xp. I'm running tftp server in CentOS. I have disabled firewall in both windows and CentOS. I use two different networks with different netmasks on CentOS. I'm able to ping the Centos (tftp server) from another Linux machine but I couldn't move any files. It's weird.

what do you mean "cannot move any files". please provide the commands run and any error messages. also check the system logs on the tftp server. a tcpdump trace would help.