client connection.open to a non-broker on qpid 0.6 windows segfaults with: access violation

In windows environment, visual studio compiler, make a client like:

Connection c;
try

{ // there is no broker running at 10.10.5.51 so an exception should be thrown c.open("10.10.5.51",5672,"my_user","my_password"); }

catch (...)

{ std::cout << "error" << std::endl; }

on qpid 0.5 an exception is thrown and catched. ALL OK HERE
on qpid 0.6 the program segfaults with the message:
"Unhandled exception at 0x692eccb9 in testqpid06.exe: 0xC0000005: Access violation reading location 0x00000000."
This error is thrown just after executing the "c.open" line.
On Linux all is OK, the problem is only on Windows.