C++/Eclipse CDT code completion problem (Wascana,mingw)

Question

Hi,

I've a problem with my CDT. Code completion doesn't work for standard library classes. For example in this code after entering x. and presing ctrl+space IDE doesn't display the list of API elements.

#include 
void f() {

 string x = "sss";
 x.
}

String and vector header files are available in Includes directories. When I press ctrl+click on the include line I'm redirected to header file.

Code completion seems to work fine for C std library.

My version of eclipse:

Eclipse IDE for C/C++ Developers
Version: Helios Release
Build id: 20100617-1415

Eclipse C/C++ Development Tools
Version: 7.0.0.201006141710
Build id: 201006141710

Please help.