ggmap doesn't show maps

I have the following code: ``` library(ggmap) ggmap(get_map(location=c(lon = 5.218922, lat = 52.342366), zoom =14)) ``` Which by my account should work fine, but I only get a standard ggplot2 image (grey background, etc), with the correct axis, but without the map shown: When I look in my working directory I do find a file called "ggmapTemp" which has the correct map in it. But the map is not shown by ggplot2. I work with RStudio and have limited rights on my work pc. Could this be the reason that the map is not shown correctly? My version of RStudio is 0.96.316 and R is R-2.15.1. ``` > sessionInfo() R version 2.15.1 (2012-06-22) Platform: x86_64-pc-mingw32/x64 (64-bit) locale: [1] LC_COLLATE=Dutch_Netherlands.1252 LC_CTYPE=Dutch_Netherlands.1252 [3] LC_MONETARY=Dutch_Netherlands.1252 LC_NUMERIC=C [5] LC_TIME=Dutch_Netherlands.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] ggmap_2.1 ggplot2_0.9.1 loaded via a namespace (and not attached): [1] colorspace_1.1-1 dichromat_1.2-4 digest_0.5.2 grid_2.15.1 [5] labeling_0.1 MASS_7.3-18 memoise_0.1 munsell_0.3 [9] plyr_1.7.1 png_0.1-4 proto_0.3-9.2 RColorBrewer_1.0-5 [13] reshape2_1.2.1 RgoogleMaps_1.2.0 rjson_0.2.9 scales_0.2.1 [17] stringr_0.6 tools_2.15.1 ``` Update: My sessionInfo() after answer 1: ``` sessionInfo() attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] mapproj_1.1-8.3 maps_2.2-6 ggmap_2.1 ggplot2_0.9.1 loaded via a namespace (and not attached): [1] colorspace_1.1-1 dichromat_1.2-4 digest_0.5.2 grid_2.15.1 [5] labeling_0.1 MASS_7.3-20 memoise_0.1 munsell_0.3 [9] plyr_1.7.1 png_0.1-4 proto_0.3-9.2 RColorBrewer_1.0-5 [13] reshape2_1.2.1 RgoogleMaps_1.2.0.2 rjson_0.2.9 scales_0.2.1 [17] stringr_0.6.1 tools_2.15.1 ``` As requested: ``` capabilities() jpeg png tiff tcltk X11 aqua http/ftp sockets libxml fifo TRUE TRUE TRUE TRUE FALSE FALSE TRUE TRUE TRUE FALSE cledit iconv NLS profmem cairo TRUE TRUE TRUE TRUE TRUE ```