Trouble with COUNTIFS() formula

I have a table that is formatted as so:

PHP Code: 

    A           B                  C                     D
1 Type    Timeinitial    Time ending           Total Time    
2   8                                                  00:00            
3   8                                                 00:00            
4   5    7/29/2012 8:37    7/29/2012 8:55            00:18    
5   5    8/4/2012 12:57    8/4/2012 13:06             00:09 


There are a lot more rows below Row 5....

I am trying to count each row where Type = 5, the total time is >00:00 and the month is August

I wrote the following formula:

=COUNTIFS(A2:A5, "5",D2:D5, ">00:00",C2:C5="mmmyyyy", "Aug2012")

I keep getting a num error...any help of this formulate is deeply appreciated!