Indiblogger Unable to Detect Feed

Hi, 

I am getting "There was a problem detecting your feed" error for my blog www.knowledgehub.co.in, due to which its Indirank is not getting updated. I checked my feed on W3C Validator and SimplePie as suggested by Renie in this thread, and the feed is getting detected at both the places.

Could someone please help me fix this?

Thanks,

Anshul