Hi xmerlyn
What is the error message?
Do you have the error message or screenshots?
The procedures on how to obtain diagnostic information/logs for VMware Converter is explained in the KB here:
VMware KB: Collecting diagnostic information for VMware Converter
Make sure you have open the required firewall ports as listed in the KB here:
VMware KB: Required VMware vCenter Converter 4.x/5.x ports
Thanks,
Bayu