Error while running ShowBapi

I was running the SAP ShowBapi service with the parameters objectname = “Purchase Order”
and methodname = “GetDetail”

I was getting this error message…
Any ideas how to circumvent this?

Thanks,
dave

com.wm.net.NetException: [B2BCORE.0064.9314] Authorization Required: [B2BSERV.0084.9004] Access Denied

The Detailed Error Message:
com.wm.net.NetException: [B2BCORE.0064.9314] Authorization Required: [B2BSERV.0084.9004] Access Denied at com.wm.net.NetURLConnection.getInputStream(NetURLConnection.java:267)
at com.wm.driver.comm.b2b.http.SessionHTTPLink.transportMsg(SessionHTTPLink.java:94)
at com.wm.driver.comm.b2b.http.HTTPLink$HTTPSendReceive.run(HTTPLink.java:446)
at java.lang.Thread.run(Thread.java:484)