How to get a stack trace from FastMM under C++ Builder?

I managed to install FastMM4 under C++ Builder 2010 but the log file generated is filled with memory dumps or with statements like

The block is currently used for an object of class: Unknown

5 - 12 bytes: TObject x 1
13 - 20 bytes: Unknown x 8
53 - 68 bytes: std::locale::_Locimp x 1
181 - 212 bytes: Unknown x 1

How to get decent info like stack trace?