I got that with several phones and it was pointless - never did anything. I don't know why it is sent and I don't know of anybody who it worked for...
See here for other ways to configure your settings. If these don't work then post your settings here for review/comment.
http://community.48months.ie/t5/Need-Help/internet-on-my-phone/m-p/31369#M10212
You seem to be using a Sony C1505 so if that's correct try this first:
http://48months.tweakker.com/choose/Sony/C1505%20Xperia%20E
Hope this helps.
