remote desktop connection doesn't work

[roudan]

I can use VPN and then remote desktop connection to connect to my office desktop using home wireless. But I can not connect to it using public Library wireless.

For this public library wireless, I can connect to the network. But I can not have internet until I open the browser to input username and password. Also, VPN is connected successfully. Everything seems to work well.

But when I use remote desktop connection, it tells me the remote computer can not be found. I don't know why.

Can anybody give me some advices?

Thanks.