HTML get method wont send data to PHP

[ZloyFox]

Data inside my form wont send to search.php. I am also using Twitter bootstrap.\[code\]<form class="form-search" action="search.php" method="get"> <fieldset> <input type="text" placeholder="Username" id="username" class="input-medium search-query"> <button type="submit" id="srchUser" class="btn">Search</button> </fieldset> </form>\[/code\]My PHP\[code\] <h2>Searched <?php print $_GET['username']; ?>; Returned 5 Results from Query.</h2>\[/code\]The 5 is static and put there for temporary use. When I send data with the form I get this error.\[quote\] Notice: Undefined index: username in C:\xampp\htdocs\Web\Statistics\search.php on line 40\[/quote\]Meaning the data was not sent to the $_GET.