Interrupt Warning Message

[Lestard]

I wrote a subroutine (subprogram), which handles a LCD and so on.
The Code looks like the following:

void init(void);

void main()
{


init(); //This subprogramm initializes an LCD and so on

while(1)
{
//There is some code
}
}

After compiling the whole program, the compiler gives me
the warning "Interrupts disabled during call to prevent re-entrancy".
Why does the compiler does this?
And there is a second problem:
e.g.
enable_interrupts(int_rda);
enable_interrupts(global);

The PIC does not execute the line "enable_interrupts(global);".
I also tried to change these two lines, but the PIC does nothing.
What could be the problem?

Thanks for every useful reply

[Ttelmah]