This is the solution for the code.  The code was:

C#FFOUFX#S#IXFD#ZJB#MUPOSBPIVLFSTB## 

If you count the number of letters in the code, there are 36; which is actually 6x6.

So you have to write it down in rows of 6 letters each. That will give you 6 columns and 6 rows which comes to:

C # F F O U

F X  # S #  I

X S D # Z J

B # M U P O

S B P I  V  L

F S T B # # 

Next step is you write the whole down again, one column at a time. 

CFXBSF#XF#BSF#DMPTFS#UIBO#ZPV#UIJOL# 

Next step is writing the previous letter in place of each letter. Example C is B, B is A and A is Z. Which make the code:

BEWARE#WE#ARE#CLOSER#THAN#YOU#THINK#

Decoded!

A/N: Congratulations to contradictori and rekoo-s for winning it!

I hope all of you enjoyed!

Comment if you had fun with this exercise!

Happy Reading! (: