Unable To Jump To Undefined Symbol

Hi,
  I got a compilation problem saying UNABLE TO JUMP TO UNDEFIND SYMBOL 
while compiling a code in which I tried to jump to a symbol(symbol_name) 
from a different file by an assembly instruction (j symbol_name).However 
I also declared the symbol as global(.globl symbol_name) but still it 
didnot worked.
The Symbol was defined as follows:
         LEAF(symbol_name)
     /*some assembly instructions*/
     END(symbol_name)
Thanks in Advance.