Unable to load graphicssystem "openvg" with shiva on Linux

I built qt 4.8.1 with openvg and it correctly linked to shiva on my linux box.
I built qtperf specifying openvg and svg in its .pro. It looks like it has correctly linked everything:

ldd qtperf4 | grep -i vg
libQtSvg.so.4 => /opt/qtsdk-4.81-optim/lib/libQtSvg.so.4 (0xb7757000)
libQtOpenVG.so.4 => /opt/qtsdk-4.81-optim/lib/libQtOpenVG.so.4 (0xb7733000)
libOpenVG.so.0 => /usr/local/lib/libOpenVG.so.0 (0xb67e3000)

But when I run it with

, I get

thanks