[chuachongchee]

Try the following maybe?

- cprestart
- reset your admin password
- Try to telnet to your ip on port 18190, see if this port is opened?

For myself, i have a weird issue, if i connect directly to a smartcenter, i get the error you got, but if i login to demo mode 1st, then retry, it works... for myself, i do believe its due to my laptop having multiple versions of smartconsole, as i'm an engineer, i have all versions of smartconsole installed frm r55 up..