VuGen 12.01 Soap_request and web_concurrent

Hello,

I'm using VuGen 12.01 and I'm trying to run a Web Service script. My need is to run all the 17 soap requests concurrently so I decided to use web_concurrent_start and end and in between the 17 soap_requests.
1) Is it possibile?
2) if yes, why I see in reply mode they are executed sequencially?
3) is there any way to have both the request response time of each soap request and the total response time for all the 17 requests (I already tried to baptezise each soap_request with a transaction name always between the web_concurrent and checked the option from RTS "define each action as a transaction from the moment i have all my soap_requests in a unique Action - it dosen't worked)?

thanks in advance

Marco