when my player get close to steps (model blocks or level blocks from WED) he automaticly lift and goes up to the block and i want it to keeps always on the floor and only get on the steps when i jump on them...

Hi, check the manual:

move_min_z
Determines the maximum size of steps or obstacles the player can step over using the OBB collision detection.

If the player collides with a polygon, the ellipsoid normal at collision point is evaluated. Collision with the floor results in normal.z == 1, collision at half the player size in normal.z == 0. For limiting the height the player can overstep, move_min_z can be set at a minimum z value. By default, move_min_z == -1, so a player can always glide upwards as long as the step does not exceed half his height. For overstepping only low steps, set move_min_z at a small positive value, like 0.4. Please note that the heights to overstep with a certain value depends on the actual player size.
Range:
-1 .. 1 (default: -1)
Type:
var
Example:
move_min_z = 0.4;
See also:
vglide, c_move, move_friction

Plus, to all those things which "sivan" mentioned, you need to place your BBOX a little bit above the ground, you need to do that in your gravity script.

thx for your help :), i've been searching, and i'm not sure exactly how to do it¡ the first mistake i did it was set GLIDE in the c_move movement mode.. i think, but what movement mode should i use? and i dont know how to place the origin of my player, all i did was to click on BBOX in WED but dunno the rest. any suggestions please?

You should use GLIDE in your "c_move" call. Search forum for a gravity script, there was one I've posted somewhere.

well yeah you right GLIDE should be in c_move. but i realized that i have that problem only with taller objects than the player!! when they are short i have no problem and everything goes ok but when there are tall blocks and i jump on them my player just keeps ascending until it reaches the last step.
and by the way the only code for gravity in my script is
c_move(me,vector(0, 0, 0),vector(0, 0, -1), GLIDE);
i worte something about placing the origin on BBOX but i dont know how to do it?
dunno what's wrong exactly

Your 'gravity' code sucks! Plus you are missing 'time_step'!!! Stop thinking, and search for gravity code I've posted some time ago, learn from it! Models origin could be anywhere, but still it's better to keep it at the models center! You should do that in MED via transform global!!


player movement (stairs)

i know but the game it self sucks so... anyway the gravity code work decent actually, the only problem i'm facing is with high blocks. when i walk or jump on small steps everything works fine, but when i jump on higher blocks the player fly and doesnt go down until it reaches the last step
i've tried with move_min_z in different values and nothing

this is the jumping code i'm using. i took it from AUM but maybe it needs to be fixed cause when i jumo on a block or model the player doesnt go downwards and it jumps again. its like when the player is in the air and reaches and obstacle beneath him the height sets to zero making it to jump again.

my code:

vec_set(temp.x, my.x);
temp.z -= 10000;
floor = c_trace(my.x, temp.x, IGNORE_ME | IGNORE_PASSABLE | USE_BOX | GLIDE); // compute the distance between player's origin and the floor below its feet


if(joy_4 && floor < 30 && jump == 0 && J == 0)
{
jump = 1;
}
if(jump == 1)
{

c_move(me,vector(0, 0, 20*time_step), nullvector, GLIDE);
J = 1;
}
if(floor > 30)
{
jump = 2;
}
if(floor < 1 && !joy_4)
{
jump = 0;
J = 0;
}

c_move(me, nullvector, vector(0, 0, -1), GLIDE);