tcpIpApp settings not being taken, no errors, can't figure out why.

Hi, 

I've been trying to figure out why, when some parameters are uploaded, nothing happens. Sometimes I can see the changes, sometimes not. I know there's a lot of reasons why this might be, but a case in point is the below xml. There are no errors, but none of the params are taken. 

How can I get this to work? Am I approaching this in the right way?

<tcpIpApp><tcpIpApp.sntp><tcpIpApp.sntp.address tcpIpApp.sntp.address="pool.ntp.voicehost.co.uk"/><tcpIpApp.sntp.AQuery tcpIpApp.sntp.AQuery="0"/> <tcpIpApp.sntp.address tcpIpApp.sntp.address.overrideDHCP="1"/><tcpIpApp.sntp.gmtOffset tcpIpApp.sntp.gmtOffset="0"/><tcpIpApp.sntp.resyncPeriod tcpIpApp.sntp.resyncPeriod="86400"/><tcpIpApp.sntp.retryDnsPeriod tcpIpApp.sntp.retryDnsPeriod="86400"/><tcpIpApp.sntp.daylightSavings tcpIpApp.sntp.daylightSavings.enable="1" tcpIpApp.sntp.daylightSavings.fixedDayEnable="0" tcpIpApp.sntp.daylightSavings.start.dayOfWeek="1" tcpIpApp.sntp.daylightSavings.start.month="3" tcpIpApp.sntp.daylightSavings.start.dayOfWeek.lastInMonth="1" tcpIpApp.sntp.daylightSavings.stop.dayOfWeek.lastInMonth="1" tcpIpApp.sntp.daylightSavings.start.time="2" tcpIpApp.sntp.daylightSavings.stop.dayOfWeek="1" tcpIpApp.sntp.daylightSavings.stop.month="10" tcpIpApp.sntp.daylightSavings.stop.time="2"/></tcpIpApp.sntp></tcpIpApp>