Cannot use ofstream members

[UnknownPerson]

Someone please help:

In one of my coding works, I needed a class wich outputed records on a file. As such, I made a ofstream member as in:

class SomeClass {
ofstream TheFile;
};

To my surprise, any attemp to TheFile.open(....) fails, no matter what the parameters. Anyone have a clue?. I made the following test:

SomeClass::OpenSomeFile(std::string& Name)
{
TheFile.open(Name.c_str()); // FAILS!!!!
ofstream SomeOtheFile(Name.c_str()); // Works perfectly
}

Any ideas???

Notes: Using MSVC++ v5.0 Enterprise. I sent this message to 3 different C++ related discussion rooms.