[R] heatmap.2 (blurred output heatmap)

[Stuart]

Hi
I used to make heatmaps using following commands but now some thing
has changed as I get

library(gplots)
heatmap.
2(qtl.map,Rowv=F,dendrogram="column",col=colorRampPalette(c("blue","lightblue","black","black","yellow","red")),breaks=seq(-4.01,4.01,length.out=51),
density.info="none", )


following error and also the ouput eatmap is also blurred so I can not
see anything! I am just wondering something has changed in package or
its just something I am getting.

Warning messages:
1: In plot.window(...) : "at" is not a graphical parameter
2: In plot.xy(xy, type, ...) : "at" is not a graphical parameter
3: In title(...) : "at" is not a graphical parameter

Any help would be much appreciated!

Cheers