Please see http://support.intel.com/support/performancetools/vtune/v71/sb/cs-006107-prd1391.htmfor information about troubleshooting call graph problems. In particular (item C), try loading the module (i.e., EXE or DLL of interest) into the Static Module Viewer (see File menu). Do you see the function in the list with the "Functions with source information" check box checked? If not, then the debug information is not identifying the function and, therefore, the call graph cannot instrument it.
If you still have problems, please submit an issue at Intel Premier Support and we will assist you.