Web Service load Test using SoapUI Pro 4.5.1

I am trying to perform Web Service load Test using SoapUI Pro 4.5.1 for the following requirement. Could someone help me do the setup for the test with following requirement?

Requirement

Pace Time : 0

Think Time : 10 Sec

Total Users : 6

Ramp Up : 2 Users for every 15 Seconds

Total Test duration : 1 Hour

For the Above requirement i have configured the Test this way:

Threads : 6

Strategy : Fixed Rate

               Rate : 2 ; Max Threads 6

Limit   : 3600 Seconds

Thread Startup Delay : 15

Please guide me with the necessary setting to do for the above load test. Thanks in Advance..

Thanks,

Subex