when i use apollo-im or mobile chat to access my aol aim account, i am being charged as "text/im" by at&t for each im received.

i thought apollo-im and mobile chat were supposed to operate under the unlimited data portion of my plan. i only have 200 text messages in my plan and they are going fast.

for example, my buddy first sends me a text message from aim to my cell phone number. then i launch apollo-im, connect to my aol aim account, select the buddy from the buddy list, and begin a conversation.

i understand being charged for the first sms to my cell phone number. but at&t also charges me for all received (not sent) im's in my apollo conversation as "text/im" usage which count against my 200 sms limit.

any help/suggestions/ideas would be greatly appreciated.