I have another user on our network with an administrator account on my MBP, who normally logs on remotely. After upgrading to 10.6 there's no remote access to their account. When I tried to access the account from the machine, I get into the account but everything is unresponsive and the only way out is to turn the computer off using the on/off button. Things are getting a bit desperate! Can you help????? Please . . .?