SVN ERROR : 'http://ipaddresshere:81/test': Could not resolve hostname ` The requested name is valid, but no data of the requested type was found

Please help me regarding this problem. I configured the Apache and Subversion in the windows server 2008. It goes well, I can access the repository in the server using my browser. In my local machine I have installed the TortoiseSVN, in the settings I e开发者_运维技巧nabled the proxy server, and in the proxy settings I put the orginal server address, the username and password and the port. When I try to check-out I encountered the errors below:

Command: Checkout from http://ipaddresshere:81/test, revision HEAD, Fully recursive, Externals included

Error: OPTIONS of 'http://ipaddresshere:81/test': Could not resolve hostname `

Error: xx.xx.xxx.xxx': The requested name is valid, but no data of the requested type

Error: was found.

Error: (http://ipaddresshere:81)

Finished!:

I also tried to access the repository in my local machine using my browser http://ipaddress:portno/test but it says "Internet Explorer could not connect to ipaddress:portno"

What does it mean? I disabled my firewall and the problem still exist. How to solve this problem?Please help me.