Strange Arm Simulator behavior

I just try to use the simulator to debug a function I call at the early begining of my main (as a debug short cut).
I use the "Step Into" but the simulator does not enter this function.
Then I had a look at the disassembly and it is very strange as you can see in the following comparison between the listing file and disassembly windows results:

In the listing file:  (I want to enter the InitIIR() function for debug):

int main(void);  // prototype pour éviter le warning du compilo
int main()
  {
       0:    e1a0c00d     mov    ip, sp
       4:    e92dd830     push    {r4, r5, fp, ip, lr, pc}
       8:    e24cb004     sub    fp, ip, #4    ; 0x4
       c:    e24dd028     sub    sp, sp, #40    ; 0x28
D:\PLSM\tampo_boulot\session 12\Base_NG_ARM_V03\Logiciel\BaseArmNG_P03_V0103_Ride\Src/main.c:74
  s16 Tamp16s;               // pour test/debug des fonctions I2C     
  s8  Tamp8s;                // pour Test/debug des fonctions I2C


// Court-Circuit debug simul
InitIIR(); 
      10:    e59f3bf8     ldr    r3, [pc, #3064]    ; c10 <main+0xc10>
      14:    e12fff33     blx    r3
D:\PLSM\tampo_boulot\session 12\Base_NG_ARM_V03\Logiciel\BaseArmNG_P03_V0103_Ride\Src/main.c:82

Where the simulator disassembles as:

InitIIR();
00005FD0                F83B9FE5             LDR      R3,[PC,#+0xBF8]
00005FD4                33FF2FE1             MSRR(Mic)  addr_CPSR(Mic)_fsxc, R3

The blx R3 just change to a CPSR mov ??
What is the wrong setting (I use a STR911FAM44 µC) ??

Thanks