Feed not found

Hi,
I have installed autoblog for my MU sites
and when i test it on my local server it works perfectly but with same settings when i deploy on my main server it says feed not found ..
I have tried all various methods to call feed but with no result
URL/MU-URL/blog/category/estate-planning/feed/
url/MU-URL/blog/?cat=48&feed=rss2

I have checked my permalinks, i have tested using tweeter feed and it displays perfect 20 feeds from tweeter account,

I have fully replicated my local server settings on my main server

It is working fine on local server

Looking forward to your response.