Per www.ads-software.com
If this isn't an option, you can try PATHINFO permalinks; put index.php/ at the start of your custom permalink structure:
/index.php/%year%/%monthnum%/%day%/%postname%/
We currently have to use the file name because it’s on a windows server, don’t ask why, cause I don’t know. It’s for a client and they refuse to migrate to linux. I’m working on getting the url rewrite module for windows installed but don’t know if it will for sure happen or not. I’m hoping it does as right now 2.0 is my only resort unless I want to lose all their event info as it’s already been migrated.