This was a problem on my old EnV with AIM. If your screen name was created with AOL instead of AIM you will need to create a true AIM screen name. You will also run into this problem if you use a screen name that is and email address such as
. See directions above to fix this also. The mobile IM app just seems to have those problems. I guess they figure we should just be happy that they no longer limit us to just 50 names in a special folder on your AIM account or charge for and app like on the PPC.