queryparameterexception: could not locate named parameter

While testing my hibernate query I got a strange exception;
"nested exception is org.hibernate.QueryParameterException: could not locate named parameter".
I checked that the said parameter is in the hibernate model. Furthermore I checked there's a corresponding column in the database. So the problem was not about these. Later I saw that there's a problem while I was trying to set my named parameter. My hql query was like "from TableName t where t.field=:field1" and I was trying to set the value in "field1" with

query.setBoolean("field_", value);

As "field_" does not exist I got this error.
The correct form was;

query.setBoolean("field1", value);

comparing dates in flex

Let's see how we can compare dates in flex.

ObjectUtil.dateCompare(firstDate, secondDate);

This call above will return you -1 if secondDate is later than the first date, 1 if it's the contrary case and 0 if they match.