delay_us works but not delay_ms

[Dewey]

Trying to make a traffic light controller but I'm very new to this, so please be patient! I am probably doing something really dumb here, but this is driving me nuts! If I substitue us for ms in the code below it will work, although the lights flash very quickly! However, when using ms, the code stops execution at the first delay_ms. If I use us for the first delay and ms for the second, it halts at the second delay.

#include <16F877.h>
#fuses XT,NOWDT,NOPROTECT,NOPUT
#use delay(clock=4000000)
#use fixed_IO(b_outputs = PIN_B1,PIN_B2,PIN_B3)
#use fixed_IO(e_outputs = PIN_E0,PIN_E1,PIN_E2)

void main()
{
char c;
while(1)
{
output_low(PIN_E2); //turns off unused RE2 output
output_low(PIN_B1); //turns off red light
output_low(PIN_B2); //turns off yellow light
output_low(PIN_E0); //turns off don't walk light
output_high(PIN_B3); //turns on green light
output_high(PIN_E1); //turns on walk light
delay_ms(1000);
output_low(PIN_E1); //turns off walk light
for(c = 0; c < 6; c++) //loop to flash don't walk
{
output_high(PIN_E0); //turns on don't walk light
delay_ms(1000);
output_low(PIN_E0); //turns off don't walk light
delay_ms(1000);
}
output_high(PIN_E0); //turns on don't walk light
output_low(PIN_B3); //turns off green light
output_high(PIN_B2); //turns on yellow light
delay_ms(1000);
output_low(PIN_B2); //turns off yellow light
output_high(PIN_B1); //turns on red light
delay_ms(1000);

}
}

[PCM programmer]

[ELCouz]

[Dewey]

I tried NOLVP added to fuses and it did not help. It will work with us but not ms. When in us mode, I was trapping on it with a logic analyzer - that was how I knew it was working. Also, like I said, I can use us for the first delay and it will get past that and hang at the next delay that is ms. The osc freq is 4MHz - verified with a scope.

[PCM programmer]

Post your compiler version. It's a 4-digit number in this format: x.xxx
You can find it at the top of the .LST file, which will be in your project
directory.

[Dewey]

4.038

[PCM programmer]

Also post a description of the external circuits that are connected to
your i/o pins. Give the component values, where applicable.

[Dewey]

Got it working! After doing some searching on the net, I found a function similar to this:

void delay_zs(int16 t)
{
do
{
delay_us(65500);
} while(--t);
}

The function gives me about .5mS of delay, so I just call the function (which I named delay_zs just to prevent any possible conflict with the built in ms function) 20,000 times to get about 10 seconds of delay. Crude, but effective! Thanks for all your help!