Sicstus Prologbeans

Hi,
I want to comunicate with sicstus using prologbeans.net. I create a prolog
file (.pl) as described in documentation and this c# code

PrologSession session = new PrologSession();
Bindings bindings = new Bindings().bind("C", k+".");
session.connect();
QueryAnswer answer = session.executeQuery("color(C,X)", bindings);

If the elaboration is too complex (more than 3 seconds) the application can
throw this exception:
errore Unable to read data from the transport connection: A blocking
operation was interrupted by a call to WSACancelBlockingCall.

Where's the problem? Always works with simple elaborations.
Thxs
Berto


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