Unknown layer: SpatialPyramidPooling in predict stage

[ahmetmelihbasbug]

Hello. I tried to import SPP in my model with RNN. I build it and my model.fit function is working. System learned. But in System testing stage, which i call in different function after model learned finished and model saved, in "model.predict" command, i got error. that error is:
Unknown layer: SpatialPyramidPooling
I run test_spp.py file and it worked. In my model, what should i do?
Thanks

[Kissadada]

load model by this way
model = load_model('/data/spp-mini_train.hdf5', custom_objects={'SpatialPyramidPooling':SpatialPyramidPooling})