Problem with cfcalendar

INVALID_CHARACTER_ERR: An invalid or illegal XML character is specified.

CODE

<cfcalendar name="" selecteddate="#form.selectdate#" startrange="#form.startdate#" endrange="#form.enddate#" mask="MM/DD/YYYY" daynames="S,M,T,W,T,F,S" monthnames="January, February, March, April, May, June, July, August, September, October, November, December" width="200" height="150">
<cfinput name="startdate" type="datefield">
<cfinput name="enddate" type="datefield">
<cfinput name="selectdate" type="datefield">