apologies, i should have put more information on here!  i use Firefox. the iDRAC isn't blocked in any way. and I tried switching from native to java in the configuration of the virtual console.  I solved this by actually rolling BACK my Java! I was on Java 7 update 13...it liked Java 6 update 22. weird.  thanks! 
hi all sorry, but i haven't had this issue before - my team mate has given me his r720 to reimage with ESXi5.1 - no worries, but when i log into the iDRAC7 and go to launch virtual console, the connection fails. I can see the little window. the server is up and running. i tried it on another PC in case it was mine after wiping all my local internet history etc. the same problem is there.  is this firmware? and something is wrong? i don't know what state this server was in before i was given it...i am new and grown like a mushroom :)  thanks in advance
iDRAC7 virtual console - connection error. will not open