How are you trying to convert ? Remote or on the machine ? Which version , try to download the latest version of standalone converter
Try to install the converter on the 2008 R2 server on which you have network connectivity to the machine you need to do P2V
Make sure these are checked
- disable Windows Simple File Sharing if your source server is running Windows XP.
- enable Workstation, Server, TCP/IP Netbios Helper and Volume Shadow Copy (Windows XP/2003, can be set to manual, just not disabled).
- Disable any antivirus software running on the source server
- Shutdown any applications that are not needed on the server
- Run chkdsk and defragment your source server's hard disks
- Keep users off the server while cloning. Disable remote desktop and any shares if possible
- Required ports are 443 and 902 (source to ESX/VC) and 445 and 139 (converter to source and source to Workstation/Server). These ports need to be opened on both OS firewalls and any network firewalls sitting between your source and destination servers.
- Check the permission of the user you are logged in and trying to convert,, i would suggest to go with the domin admin account
- TCP/IP and UDP Port Requirements for Conversion and setting this up Ports Used When Converting a Powered On Physical Machine Running Windows