display data ( text) on leveplot / Superpose panel

I am trying to display data ion top of colored rectangle on the same levelplot. While using superpose the shape and symbol for levelplot changes to small circle. I am unable to figure what exactly I am doing wrong... It may be straightforward solution... .I will appreciate help to fix this issue.
brewer.div<-colorRampPalette(c("pink","green","blue","yellow","red"), ?interpolate="linear")levelplot(ds, ?shrink=c(0.9,1), aspect=3/5, scales=list(x=list(rot=0)), cuts = 10, col.regions = brewer.div(20), xlab="",




?ylab="" , ?main="" ,
panel = function(x,y,z,...) {
? ? ? ? ?panel.superpose(x,y,z,...)

? ? ? ? ?ltext(x,y,paste(z), adj=c(0,2), cex=.8, col='black')}


)

where ds is matrix
?pct20 pct40 pct60 pct80 pct100A ? ?16 ? ?18 ? ? 6 ? ? 2 ? ? ?0C ? ?19 ? ?11 ? ? 7 ? ? 0 ? ? ?0D ? ? 9 ? ?16 ? ? 2 ? ? 0 ? ? ?0E ? 135 ? ? 9 ? ? 0 ? ? 0 ? ? ?0J ? ?90 ? ?57 ? ? 3 ? ? 1 ? ? ?0M ? ?47 ? ?17 ? ? 1 ? ? 0 ? ? ?0T ? ?19 ? ? 9 ? ? 3 ? ? 1 ? ? ?0

ThanksKulwinder Banipal