First, iCam Pro/iCamSource Pro will not work with iCam. Second, unless you plan on using your iPhone as Source to view via another iPhone you do not need iCamSource Pro Mobile.
You need to run iCamSource Pro on a computer with a webcam in order to view the webcam on your iPhone. Once iCamSource Pro is running on your computer, select your webcam from the Video drop down list and your microphone from the Audio drop down list (or No Audio).
Then set your login and password. You can set the login and password in iCamSource Pro to be anything you want. Make sure it’s something other people won’t be able to guess easily.
In iCam Pro on your iPhone, make sure you are using the exact same login/password you entered in iCamSource Pro on your computer. To edit the login and password in iCam Pro on your iPhone, click the "i" button in the bottom right corner of the screen. That button will take you to the Settings page, where you can edit the login and password.
There is more information about setting up iCam Pro here:
http://skjm.com/icampro/help/If you are still unable to connect, what error message are you seeing?