Custom scatter file error

Hi all,

I want to place a function at a specific location in the memory. I wrote the function in a separate source file and edited the default scatter file as follows:

LR_IROM1 0x00000000 0x80000  {    ; load region size_region
  ER_IROM1 0x00000000 0x5000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }

  ER_IROM2 0x9000 0x1000  {  ; load address = execution address
    fun.o                 ;place the function here
  }

  ; 8_byte_aligned(49 vect * 4 bytes) =  8_byte_aligned(0xC4) = 0xC8
  ; 32KB - 0xC8 = 0x7F38
  RW_IRAM1 0x100000C8 0x7F38  {
   .ANY (+RW +ZI)
  }
  RW_IRAM2 0x2007C000 0x4000  {  ; RW data, ETH RAM
   .ANY (AHBSRAM0)
  }
  RW_IRAM3 0x20080000 0x4000  {  ; RW data, ETH RAM
   .ANY (AHBSRAM1)
  }
  RW_IRAM4 0x40038000 0x0800  {  ; RW data, CAN RAM
   .ANY (CANRAM)
  }
}

The program compiles and links properly. However when I download the code, it does not run.
Anyone know what mistake I have done here?

Some Extra details:
Platform: ARM Cortex-M3, LPC1768 (Mbed)
The function is a simple blinking led routine.