Bug in IR sensor code

[Tazlikesrobots]

I got a problem with my IR sensors code. Everything works ok until the robot reaches the end of the white line. I thought i'd be cleaver and wrote an if statement that says if rc_sw 1,2 & 3 =0 then go straight, however the robot goes into a left hand loop.

Any help or suggestions would be greatly appreciated!!

Here is the code I wrote:

FullAutoMode:

if rc_sw2=1 then straight:
if rc_sw1=1 & rc_sw3=0 then turnleft:
if rc_sw3=1 & rc_sw1=0 then turnright:
if rc_sw1 & rc_sw2 & rc_sw3=0 then straight:
goto endir:
straight:
debug "staight",cr
p1_y = 234
p3_y = 254
goto endir:

turnleft:
debug "left",cr
p1_y = 84
p3_y = 127
goto endir:

turnright:
debug "right",cr
p1_y = 127
p3_y = 84
goto endir:





KillAuto:

endir: