Oblique Mercator - border not showing


I’m using the -JOa oblique mercator option and for some reason my border annotations are not showing up in my .ps file.

Here’s the line of script I used:
gmt grdimage -Ihillshadefile -Ccolorfile -R-106.12/-4.58/-105.91/-4.55+r -JOa-106.2W/-4.59N/-8/20c+v -B0.02WESN -K -Q -V > ps_file

The image contains a black line border but no coordinates. Any advice? I’ve tried changing my -B flag with no avail…

Thanks, Paige