Telus, if memory serves is a canadian carrier. Don't worry its nothing to be afraid of. When you are trying to send a picture message what does it say? If it say message delivery fialed then sounRAB to me that you haven't deleted the default connection that PIE creates.
What you do is press the envelope button on your phone and it will automatically erase that default connection for you. Once that is doen try sending a picture again.
Also remeraber to set your settings for MMS as download manually not auto.