I started to do some GSM controller project with the PIC, as a school project. But I constantly arises a problem that my pic "goes crazy". At end I think it's problem with the Interrupts. I had connected a LED on RB.0 that is a INT input, and when i set the RB.0, in the program, on 1 the PIC start to act crazy (LED's blink, and he send some partial informations trought the USART). I tried to not set RB.0 on 1 and everything works fine. So I tried to connect the LED on RB.4 (it's a INT input again) and the same problem occurs when i set it to 1. I tried to set the INTCON=0 (INTCON.3, INTCON.4=0) but the problem is still there.

Here is some example of the PBP code:

Code:
DEFINE OSC 8
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 20h 
DEFINE HSER_BAUD 9600 
DEFINE HSER_SPBRG 12
CMCON = 7
INTCON=0
symbol LED1=PORTB.3
SYMBOL LED2=PORTB.4
SYMBOL SDA = porta.0
SYMBOL SCL = porta.1
DEFINE I2C_SDA PORTA.0
DEFINE I2C_SCL PORTA.1
adr VAR BYTE
ZNAK VAR BYTE [5]
OUTPUT LED2
OUTPUT LED1
adr=20

serial:

hserout ["SERIAL"] 

hserin 3000, serial, [str ZNAK\5]
pause 100
HIGH LED1
PAUSE 1000
LOW LED1

I2CWRITE SDA, SCL, $A0, adr, [STR ZNAK\5]
PAUSE 10
HSERIN [WAIT ("OK")]

GOSUB LDE
PAUSE 500

HIGH LED2
PAUSE 2000
GOTO SERIAL
LDE:

HIGH LED2 
HIGH LED1
PAUSE 1500
LOW LED2
PAUSE 1500
LOW LED1
HIGH LED2
PAUSE 1500
HIGH LED2
LOW LED1
PAUSE 1500
LOW LED2
RETURN

END
I hope someone can help me!

P.S. Sorry for my beeeeeddd english!!!!