Using Related List and Enhanced List on Same Page

I faced a problem when I needed to show enhacnedList and RelatedList on same VF-Page.

used snippet was as follows:

When I refresh Page I got salesforce Error as following:-

I could not find the proper solution of this problem only one solution I have right now to change its 

order of displaying.

When we keep RelatedList before enhancedList then page works fine.