Error in ROOT 6.06/04

I am using root 6.06/04. Each time I try run a code or try to do something in root I get the following error:

root [0] 2+2
IncrementalExecutor::executeFunction: symbol ‘_ZN5cling10printValueEPKi’ unresolved while linking [cling interface function]!
You are probably missing the definition of cling::printValue(int const*)
Maybe you need to load the corresponding shared library?
(int) Error in ValuePrinter: missing output string.
root [1]