BB Bold 9700 :: Unable To Send Email - Error Message "transaction Error Failure At Service"

I had a curve 8310 on o2 and moved to a bold 9700 still on o2.When i moved i used the desktop manager and did the device switch over, all went well including bbm etc.However whenever i tried to send an email i recieved the error message 'transaction error failure at service' - I tried to log into my bis account online to update my pin but i couldnt log on! i havent changed the password or username since my old blackberry so i cant log on to change it online. on my blackberry when i try to log on to email settings it says the username field is blank!

i called o2 they put me through to geek squad and wanted to charge me to help!!! I havent had the phone 2 weeks yet.Now i think that i need to call o2 again and ask them something like releasing my old pin maybe from my bis account or resetting the bis account,any ideas what i should do or the type of questions i need to ask o2 if i have to ring them again.