Hello Phey
I am V. Arya, Independent Advisor, to work with you on this issue. Your formula is allright. Most likely reason may be that comma separator may not be right separator.
Press Windows key+r - Type intl.cpl and Enter - Additional settings - Check what is the list separator here.
For time count query, you can use following type
=COUNTIF(A2:A10,">"&--"02:45:55")
=COUNTIF(A2:A10,">"&TIME(2,45,55))