Problem reading SimpleXML array

Hi, I'm having a problem reading an xml feed. This is my object: SimpleXMLElement Object ( [Header] => SimpleXMLElement Object ( [ID] => FX12GB [Test] => false [Name] => Foreign Exchange United Kingdom Pound Noon Rates [Prepared] => 2005-10-24 [Sender] => SimpleXMLElement Object ( [Name] => Federal Reserve Bank of New York [Contact] => SimpleXMLElement Object ( [Name] => George Matthes [Email] => george.matthes@ny.frb.org ) ) [ReportingBegin] => 1994-01-06 ) [DataSet] => SimpleXMLElement Object ( [Series] => SimpleXMLElement Object ( [Key] => SimpleXMLElement Object ( [FREQ] => D [CURR] => GBP [FX_TIME] => 12 [FX_TYPE] => S ) [Obs] => SimpleXMLElement Object ( [TIME_PERIOD] => 2005-10-21 [OBS_VALUE] => 1.7692 ) ) ) ) I'm trying to get those last two lines: TIME_PERIOD and OBS_VALUE. I can get the ID (third line) using $s->Header->ID (where $s is my object). $s->DataSet->Series->Obs->TIME_PERIOD; // 'Trying to get property of non-object' $s->DataSet->Series->Obs['TIME_PERIOD'] // 'Trying to get property of non-object' $s->DataSet->Series->TIME_PERIOD // 'Trying to get property of non-object' $s->DataSet->Series['TIME_PERIOD'] // No error but no data $s->DataSet->TIME_PERIOD // No error but no data $s->DataSet['TIME_PERIOD'] // No error but no data Can anyone point me in the right direction please? MTIA George