SQL Server where clause with two date : I use this query in my app

**"SELECT * FROM Vi_WebReport WHERE Legajo=? AND ent>=? AND ent>=?"**

So, legajo its a number thats identify one person. And ent its a date. The query works ok, but when i want to select only one day like:

**SELECT * FROM Vi_WebReport WHERE Legajo=1 AND ent>=02/02/2017 AND ent>=02/02/2017**

The query show empty table.

Thanks!