Yes its is true...so I asked the tech support at the HOSTING company..!
They ask me what port does XML Sitemap WANT TO OPEN..?
They say depending on the PORT could be a security risk and wont allow it.
PLEASE PLEASE BE A GOOD PORT to want open...my days will be so sad ...
I ASK GOD almighty to bring me a nice port to open...
I asked GOD and he doesnt know...maybe someone smarter than GOD can tell me..
Please help ...I and god will think you are the best.