It seems like I always have problems with FPSC

. I've posted a thread about a problem I encountered with GamerX's bears weeks ago. However, it seems like those problems aren't limited to the bears! Any non Dark AI character, holding a gun or not, has the same problems.
If you were wondering what problems I'm talking about, here they are:
When many characters are in the range, according to its script, to set the player as a target, they will perform the walking animation but not move. Sometimes they will move but they will stop when you go a certain distance away from them. Often times, even if you are quite close to them, they will still play the walking animation and not move unless you get close enough to be attacked. If you want them to move without going close to them, you can shoot them but they will only move forward a bit before stopping.
Here's a video:
http://www.youtube.com/watch?v=XSDSJH9YZ48
PC specs:
Windows 7 Home Premium 64 bit
AMD A6-3420M with Radeon HD Graphics
4 GB RAM
AMD Radeon HD 6520G
FPSC Version: v1.20 beta_19j
I reinstalled FPSC yesterday as well as removed the dbo and bin files and there's no difference.
Don't waste your life