Time Part Being Dropped By Procedure

I have writen a nested stored procedure when i am passing a datetime paramter from the first procedure into the internally called procedure it is dropping the time part.

EX;
Declare @pdate datetime
Exec sp1 @pDate<this is datetime> = '2013-10-19 14:00:00'

Create proc sp1
(@pdate datetime)
as
Begin try

Exec sp2 @pdate <this is the same parameter for sp1>
End try
Begin Catch
Select 'error'
end catch