HI
I have a problem and hope someone has any experiance:
i made a small game by physic and when i run by sed, every thing is ok but when i publish project,i have some error.
every thing is ok but pXent_setcollisionflag return 0 that means it cant do and has problem.
i check two entity pointer to valid(not NULL) but i have problem.
can any one gess why?

You have ALL physX dlls?
If your not sure, look in C:\Program Files (x86)\GStudio8\acknex_plugins and copy them all

yes
other part of physx runs.
just pXent_setcollisionflag return 0.

I found that some variables like time_effects are valid just in development version.
1- how can i notice that game run in dev mode (run by sed) or run by published exe?
2- is there any diffrece between dev mode and publish mode?

1. You can check the run_mode variable: http://www.conitec.net/beta/run_mode.htm
2. Some statistic variables do not get updated, but that's it pretty much I guess.