Hi it's me again.
I tested the new update of events planner and it worked perfectly.
I forgot that I had the latest Jetpack plugin (for wp 3.5) installed previously and was disabled, so i enabled it, but somehow it makes the
events planner plugin disappear in the front-end. like it somehow wont run the shortcode. anyway, I deactivated jetpack because i only needed one feature of it and might look for an alternative. I'm not well versed with
troubleshooting for these errors so I don't really know where the problem is. But I just want to give you a heads up, in case others may have the same problem. I will be notifying jetpack about this issue too, because it seems to conflict with my template as well.