hi, i have this site built on .net and aspx pages .. am trying to install blog on other server.. but the url of it will be http://blog.xxx.com how to redirect it ..? no .htaccess
Should be simple but exactly how depends on your setup. Which control panel are you using or are you setting things up in IIS?
Install the blog on the another server. Setup the subdomain blog.xxx.com on the server where the blog is installed. Insert the BLOG DNS A record in your DNS server pointing to the server IP address where your blog is hosted.