When I use the play sound, theres some weird things happening.
1. The volume is extremly low event tho i set the ent_playsound's volume to 100.
2. If the player collides with an entity or floor while a sound is playing, the sound will stop.

whats going on?

1) Your range is proably to small, set the volume to 1000 and see if thats better.
The range is something like 10 * volume, if I remember right. At least when using ent_playsound

2) Well, what are you doing in the code?
Is another sound supposed to play?
You don't give enough info about this one.

Have fun.

BTW, did you figure out your gravity problem?
With the ball, that was you right?

Yes i did. I made it so the ball is constantly tilting, and on a collision, detects if the surface is less then 0 tilt, so the ball doesn't keep bouncing up on everything it touches.