2. chmod data dir to 0777 if the data dir doesn't exist you can create a data dir in your root AccessProbe dir and chmod it to 0777 or see 3.

3. If the data dir does not exist in your root AccessProbe directory, AccessProbe will attempt to create this directory as well as set the proper permisions so the directory is writable. For this to succeed the root accessprobe dir must be writable. Depending on permisions on your server it is possible that you will not be able to delete a directory created by a script evan though the script attempts to set chmod the dir to 0777.
Either chmod your root AccessProbe dir to 0777 or create a data dir and chmod it to 0777