I got CA ArcServe and Veeam B&R on the same physical server.
After apply this: "Solution is to change the setting of auto-start CASportmapper service from Automatic to Automatic (Delayed start)" (thanks DonFirst), the problem remains.
When I execute the command: netstat -nba >c:\veeamnfs.txt, the port 111 has used for portmap.exe (a Windows Service). After stop (and disable) the "ONC/RPC Portmapper" Service, and restart de Veeam vPower NFS Service, I finally can connect a datastore to the veeam server.
I hope this can help anyone.