I would recommend using a user-defined trace, use Profiler Event "UserConfigurable:0" to watch it:

DECLARE @DebugStr NVARCHAR(100)

SET @DebugStr = @eventdate + ' ' + convert(varchar(6), @amount)

-- Log Custom message to Profiler User Defined Event 0)

EXEC sp_trace_generateevent 82, @DebugStr

-Dan