I think you need to use the same variable names, so if you want to use columns 2,3,4 for your prediction, the names shoult be X1, X2, X3 as they are used for the model (not col2, col3 and col4 as you have).
Try for example colnames(collection) = c("X0", "X1", "X2", "X3") before the predict call and it should work (although I don't understand if you really wanted to use col2, col3 and col4 for predicting).
