I ran into the same issue after upgrading witha Custom Rom. The first fix I used was getting the windows Push email. Not sure whre exactly I got it, I am guessing a search might bring it up, this link
here could be it.
Since then I however have been using WIndows Live version 10.6.0034.0800 which I think I got from a sharing site, but could be
here also. Just a start , maybe it will help.