arx expansion board

hi guys ive had the v-studio for 2 months now and find it great ... i have just bought the arx-01 drum expasion board i installed it as per book and i thought that would be it ... i must be missing something so can some one help ......my steps are as follows........i open the synth rack, drop down the soft synths and go to arx then it says ..(cannot open arx midi ports pease ensure arx is connected and that the midi ports are not selected in the host)...then it says the folowing vst plug instrument failed to load ......is the arx expansion board a soft synth or a vst plug in and where should i access it from ...i thought i could access it like i do the fantom...... a step by step description of the installation would appreciated thank-you