HALT probem in DEBUG LAUNCHPAD 28027F

DEAR

I begin to use CCS6 recently.There are many problems confuse me.

 1 CCS6 often display “NO RESPONE” then HALT.

2 After close the CCS6 , the CCS6 don’t release the WORKSPACE.

   You must reset PC before another CCS6 running.

3 In the EDIT MODE , The HALT fault have low freqency.

  But There are high freqency  in the DEBUG MODE

4 I use PC and NB to try it, The results are identical,

   PC is WIN-XP pro SP3 +CPU INTEL G630(2.7GHZ) RAM 2G

   NB is WIN-7 home SP1+CPU is INTEL B940(2GHZ) RAM4G

5 The test code is very simple.

int i;

for(;;){

   i++;

}

6 I use LAUNCHPAD F28027F as target board.

Do anyone can give some suggestions?