There is an error in your form/input line:
<p><input type="text" name "Email" value="your@email.com" onfocus="if(!this._haschanged){this.value=''};this._haschanged=true;"></p>
after the name parameter is no equal sign. So i think this is the problem why there is no value in your text file.
<p><input type="text" name="Email" value="your@email.com" onfocus="if(!this._haschanged){this.value=''};this._haschanged=true;"></p>