Subdomain Not Working Properly

Hi,
My blog (blog.cindyhsu.net) isn’t working properly.

blog.cindyhsu.net isn’t interchangeable with cindyhsu.net/blog, and as a result, Google Reader subscriptions don’t work if you type in “blog.cindyhsu.net” (it automatically saves it as “cindyhsu.net/blog/feed” which is invalid). I tried switching the General settings of my WordPress URL to cindyhsu.net/blog, but then blog.cindyhsu.net won’t work. I was previously hosted on GoDaddy and everything worked and subdomain urls were interchangeable (subdomain.domain.com and domain.com/subdomain) and my feeds had no issues. I recently switched providers to iPage and that’s the only thing I’ve done differently. I transferred all of my themes and posts as is, and created a Feedburner link for them. I’m also using FD Feedburner Plugin to redirect my WordPress feed url to my Feedburner one.

Please help!