Dear Experts ,

Recently my team created a new master page to replace seattle default page in Sharepoint 2013. Things were fine till the moment we accessed one of site page containing a Report Viewer Web Part to load SSRS rdl. The web part is blank with just standard SSRS toolbar and parameter. To isolate the problem, I have confirmed that the same page works fine in seattle master. I notice that something could be missing in our site (though I am clueless on what those are). There is one post online from someone with potentially similar issue, but it does not help in our case. Some pointers from will be appreciated. Cheers.

http://blogs.msdn.com/b/selvar/archive/2013/11/28/using-reporting-service-web-part-with-sharepoint-custom-master-pages.aspx