Action Script select XML element with ':' symbol on tag name

[watsonpizzazz]

I'm working with the Livestream API, and I need to get some XML with the desired channel info, so i'm having problem when reading the XML values with the XML object, because the tags are have the ':' symbol in the tag name, like this:\[code\]<ls:isLive>true</ls:isLive>\[/code\]When I try to select like this, it obviously return me a parsing error:\[code\]xmlData.ls:isLive\[/code\]And then I tried this way, but it returned me empty value:\[code\]xmlData["ls:isLive"]\[/code\]How can I select this element's value by the tag name?