Websphere 5.0 Application Server to Webmethods IS 6.1

Has anyone tried to connect from a Websphere App server to a webMethods server? We are currently using the Java API (Client.jar) from webMethods to connect to the Integration Server from our Websphere App Server. We have experienced some connections issues, and are trying to determine the best way to accomplish this. I briefly investigated the EJB adapter from webMethods, but this adapter assumes that you are calling Websphere FROM webMethods, not the other way around, which is the direction that we are trying to call. Ideally we would like to pool several webMethods connections in our Websphere Container to enhance scalability. any thoughts? any input you have would be greatly appreciated.