>yes, i do write some coding in key press event
>
>IF nkeycode=127 AND this.SelStart=0 AND this.SelLength=0
> NODEFAULT
>ENDIF
>
>this prevent cursor move back to previous text box....

You may put

IF inlist(nkeycode, 127, 15) AND this.SelStart=0 AND this.SelLength=0
	NODEFAULT
ENDIF

15 is the code for shift-tab, which also causes backward movement.

But this still doesn't solve the problem you have - the code for tab is 9, and your keypress code doesn't touch that.

Check your set("confirm"), make sure it's off.