Macbook is confused?

I just moved into college and I am using the wireless internet in the dorms. To connect to the network we use “Aventail Connect”. Ever since I installed this program two days ago I have been experiencing problems with my computer. I am running a Macbook model # 10.5.4 & it seems to me whenever I close my computer it thinks it is still open and vice versa. The white status light is not on when I am doing work on the computer when it is open but it becomes lit & remains lit when I close the top. When I open the computer back up I have to force-shut down the computer and start it again so it will do anything. My roomate is having this same problem with her Macbook. I have tried resetting PRAM & taking the battery out and pressing the power button. I am out of my 90 days of over the phone support. please help. THANK YOU!