I'm trying to deploy the agent to a discovered device but getting "Error: Credentials invalid. Please ensure that Classic file sharing is enabled on the target device."

I've changed the group policy to classic and I can access it via \\IP_address\c$. I've also disabled the firewall, and double checked the windows credentials.

ZCM 10 SP2 trying to deploy to Windows XP SP2.

Am I missing something? Please help!