first layer of model printed on raft not sticking

So i have some issue with the first layer of the raft. With models where the raft is smaller everything works great. But on a model with a 4"x4" base the raft prints great but the first layer of the model doesn't want to stick to the raft. The second layer and the rest of the model print great as well its just the first layer. Any thoughts or ideas? Below are some pics showing example