I'm assign the folowing string to a tree control property name navigatorUrl

header= Welcome to BEA  this is not fun

 AddQuestion.NavigateUrl = header

it gets render by the webform as

header='<BODY><IMG src=Emoticons/6.gif>&nbsp;Welcome to BEA <IMG src=Emoticons/3.gif>&nbsp;this is not fun</BODY>'&

space character is what is causing my headed. Is render the value of space from   to &nbsp and when I call webpage a with querystring it parses from & cuttinh my string. is there a way I clud get around this?