Linden Lab has blocked the third party Android client “IM to Secondlife”; it may no longer be used to access Second Life. We did so due to serious violations of the Policy on Third Party Viewers relating to user account security and user privacy.
If you have ever used that viewer, Linden Lab strongly suggests that you secure your Second Life account, beginning with updating your password on the Second Life account page:
We may need to temporarily hold some accounts in connection with this incident. Please ensure that your contact information is up to date and verify your email address: https://accounts.secondlife.com/change_email/