Connection timeout with Ruby script

When running a Ruby script using classes generated through wsdl2ruby (part of SOAP4r), the login is successful, but a subsequent search generates a SOAP fault complaining that the connection has timed out.  The query is submitted immediately following the successful login.  If the same steps are executed manually from within the Ruby interactive interpreter (irb), the login and the search are both successful.

Removing all of the flow control and error checking, the script boils down to this:

service = NetSuiteService.new
service.login(uid, pwd)
service.getFutureEvents
service.logout

NetSuiteService is a slim wrapper around NetSuitePortType generated by wsdl2ruby.  Even if I replace it with direct calls to NetSuitePortType (as per the code below) from the script, the result is the same.