[Xymon] graph coming into DERIVE formant instead of GAUGE

I see $rrdtool dump IdAp.rrd|grep type is DERIVE and so no graphs is coming on browser. Below is the file configurations.

client send the data in NCV format, eg.

ApacheIdleThread: 50

xymonserver.cfg: - if_load=devmon,*IdAp=ncv*,temp=devmon,paging,mdc,mdchitpct,cics,dsa,getvis,maxuser,nparts,xymongen,xymonnet,xymonproxy,xymond"

NCV_IdAp="ApacheIdleThread:GAUGE"

graphs.cfg: -

[IdAp] TITLE Apache Idlethrd info YAXIS Idlethreads DEF:ApacheIdleThread=IdAp.rrd:ApacheIdleThread:AVERAGE LINE1:ApacheIdleThread#44CCAA:ApacheIdleThread GPRINT:ApacheIdleThread:LAST:Idle Threads \: %5.1lf%s (cur) GPRINT:ApacheIdleThread:MAX: \: %5.1lf%s (max) GPRINT:ApacheIdleThread:MIN: \: %5.1lf%s (min) GPRINT:ApacheIdleThread:AVERAGE: \: %5.1lf%s (avg)\n