Creo Simulate 2.0 optimization gets stuck! (need urgent help please)

[topdog33233]

i have 2 problems concerning simulate :

1- the thermal and structure icons on the desktop say : can't find license file . I tried adding the environment variables and nothing happened.

2- in simulate when i try to run an optimization or a sensitivity study it hangs AT "Starting Creo in the background" and the log file is like this :

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Creo Simulate Structure Version P-10-26:spg
Log for Design Study "study1"
Sat Apr 12, 2014 14:00:47
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Engine Command with the specified command line options:

C:\Program Files\PTC\Creo 2.0\Common Files\M090\mech\x86e_win64\bin\msengine.exe study1 -i . -w . -solram 6000 -iter 2 -max_iterations 3000 -sturm default -num_threads 1

Begin Creating Database for Design Study
Sat Apr 12, 2014 14:00:47
Elapsed Time (sec): 0.26
CPU Time (sec): 0.20
Memory Usage (kb): 30554
Work Dir Disk Usage (kb): 0

Step Elapsed Time (sec): 0.01
Step CPU Time (sec): 0.00

Begin Integrated Mode Error Checking
Sat Apr 12, 2014 14:00:47
Elapsed Time (sec): 0.27
CPU Time (sec): 0.20
Memory Usage (kb): 30554
Work Dir Disk Usage (kb): 0
Checking the model before creating elements...
These checks take into account the fact that AutoGEM will
automatically create elements in volumes with material
properties, on surfaces with shell properties, and on curves
with beam section properties.

Step Elapsed Time (sec): 0.03
Step CPU Time (sec): 0.02

Begin Generating Elements
Sat Apr 12, 2014 14:00:47
Elapsed Time (sec): 0.30
CPU Time (sec): 0.22
Memory Usage (kb): 30554
Work Dir Disk Usage (kb): 0

Copying elements from an existing study model ...
Successfully copied elements from an existing study model.

A complete set of elements already exists.

OK

Step Elapsed Time (sec): 0.08
Step CPU Time (sec): 0.06

Begin Integrated Mode Error Checking
Sat Apr 12, 2014 14:00:47
Elapsed Time (sec): 0.38
CPU Time (sec): 0.28
Memory Usage (kb): 37226
Work Dir Disk Usage (kb): 0
Checking the model after creating elements...
No errors were found in the model.Updating the geometry...
Starting Creo in the background...

and it shows a dos cmd screeen with the title : rundpi and says :
pro_command defined to "C:\Program Files\PTC\Creo 2.0\Simulate\bin\simulate.exe"
"C:\Program Files\PTC\Creo 2.0\Simulate\bin\simulate.psf"

PLEASE HELP? i have looked everywhere and i can't find a solution.
Please notice that i animated the model and it didn't give any errors.. any ideas?