OCC 5.2 DLLs recompilation

I get the following error while trying to recompile the Visual C++ 6.0 project for TKIGES.DLL, referencing Open Cascade 5.2 classes
(OS WINDOWS 2000, SP5).
The Same Error occurs for recompiling the TKKERNEL.DLL, TKBOOL.DLL, TKSHHELING.DLL, TKXSBASE.DLL (only *.cxx files will be different).

Please kindly advise if you have come across similar issues.

Kind regards,

Mark

IGESSelect_WorkLibrary.cxx
D:\OCC\ros\src\IGESSelect\IGESSelect_WorkLibrary.cxx(99) : error C2679:
binary ' type 'class TCollection_AsciiString' (or there is no acceptable conversion)

Note:
The recompilation works OK for those DLLs on PC with XP OS.