I download and install the new Flex Master 188.8.131.52.17 VM after the install finish i can ping the server but when i try to access the WEB interface via IP it just wont load, do i have to start a specific service inside the CentOS ?
I'm not a FlexMaster expert (or..an expert), but try
-turning off iptables firewall
-telnet/ssh from your FM shell out to another host (or traceroute..anything to validate IP connectivity).
-Double-check the settings for your guest OS (networking, etc) are exactly as stated in the manual (bridged vs NAT, etc)
Meanwhile I'll see if we can get an actual expert here...