What steps will reproduce the problem?
1. import the project
2. run, than the app force to close
3.

What is the expected output? What do you see instead?
expected videostream. Sees a Error window and force to close.

What version of the product are you using? On what operating system?
2.1

Please provide any additional information below.
I tried to refer the marker in the CustomActivity"s constructor but the error 
is still occurring. I don"t know if i"m doing it right. Is there anything else 
I could do to run the app?