SWFobject 2.0 and flashvars symbol + problem?

Hi all,

I have a problem with a dynamic textfield and showing the + symbol

I am using swfobject, like


var flashvars = {
	telstring: "+31 (0) 20 555 79 48"
};
swfobject.embedSWF("assets/flash/demo.swf", "demo", "700", "442", "8.0.0", "js/expressInstall.swf", flashvars);


but my dynamic textfield shows 31(0)205557948

the spaces and the symbol + don’t display?? I already embedded the symbols.

any tips/suggestion?

regards