[Help!!] P-spice Error --> Time step too small..



hi, all
I'm lcd engineer who design the electric circuit.

recently, i use spice to pridect my circuit and i'm in trouble now.

there is an error -"Time step too small"

to solve the problem, I add some options.
The options are:
-. ITL4=100
-. RELTOL=0.01
- change the time step : 1us --> 50us

but error is still with me.

show me the way, Plz...

regards,
jason
.