Help mms picture message issues?

[drunken_prozac]

Hey everyone,

just a quickie about sending pictures,
My girlfriend has a samsung jet, my friend has a sony ericsson c902, my mum has a newish nokia, my dad has a samsung 'something' and my friend has a iPhone-

When sending a picture message from my hero (2.1 orange) it sends fine but the recipient cannot open the message. on the phones above it says the format incorrect and on the c902 it says 'file corrupt'

So basically the message is getting to teh phone but cannot be opened.
Is this just the way the hero takes pictures and sends them or is there something set up wrong?

thanks

Darren