To get this to work for you,
As you have done, set up your controller for the 240 channels of Pixelnet.
You need to use a LYNX dongle programmed for PIxelnet.
You can either set each of your rigid strips on a single controller or you could have 1 Smartstring Controller for each.
To do this,
You need, 8 Smartstring Controllers, 1 Smartstring hub and 1 Lynx dongle and you need the smartstring configuration utility
build 8 smartstring controllers.
Start Number for controller 1 thru 8 would look like this
Controller 1 = 1
Controller 2 = 25
Controller 3 = 49
Controller 4 = 72
Controller 5 = 121
Controller 6 = 145
Controller 7 = 169
Controller 8 = 193
Configure each controller with as pixelnet and then you will simply have to choose which com port the lynx dongle is on that has the pixelnet firmware on.
When you create your controller is LSP follow this and you will be able to control each strip within the entire set
OR
Create 1 SS controller starting at 1 with 240 channels as a pixelnet controller in LSP. Plug that into the smartstring hub. Each Strip will have to be connected to the smartstring controller so that it will get both power and data. It will automatically configure itself and then you will simply have to choose the com port that the lynx dongle which has the pixelnet firmware is on
Hope it helps