Unable to obtain hardware information for the selected machine

I'm trying to convert a VM from VMwareServer2 to ESXi using VMware vCenter Converter Standalone Client V5.0.0.

The VM is a WinNT OS called client1.vmx I have copied locally in the computer where the converter is installed.

I get the error message "Unable to obtainhardwareinformation for the sleected machine." I've read a few threads here, but so far  nothing I have tried helps.

The main prolem is that as soon as get the error message I cannot continue the process and I am obliged to cancel the conversion and no log can be obtained from the conversion process.

The log I can proivide are those:

Local Settings\Application Data\VMware\VMware vCenter Converter Standalone Client\Logs

--> (converter.ComputerSpec) {
-->    dynamicType = <unset>,
-->    location = (converter.ComputerSpec.VMwareHostedVmLocation) {
-->       dynamicType = <unset>,
-->       configFilePath = "D:\Shared\VM\rigsense-client1\client1.vmx",
-->       password = <unset>,
-->       networkUsername = <unset>,
-->       networkPassword = <unset>,
-->       type = "vmwareVM",
-->    },
--> }
2012-02-16T14:22:06.522+02:00 [04440 info 'ConverterSession'] Converter::Client::Gui::Common::DiagnosticDataProvider::SetLastKnownSource - Setting last known source:
--> (converter.ComputerSpec) {
-->    dynamicType = <unset>,
-->    location = (converter.ComputerSpec.VMwareHostedVmLocation) {
-->       dynamicType = <unset>,
-->       configFilePath = "D:\Shared\VM\rigsense-client1\client1.vmx",
-->       password = <unset>,
-->       networkUsername = <unset>,
-->       networkPassword = <unset>,
-->       type = "vmwareVM",
-->    },
--> }
2012-02-16T14:22:06.787+02:00 [05028 error 'wizardController'] Cannot query source HW info: vmodl.fault.SystemError
2012-02-16T14:22:09.990+02:00 [05028 verbose 'ManagedMachineDataConnectionLogger'] VimConnectionStore stopping keepalive