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Somethings wrong with my simulation?

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Something seems wrong with the model of the 7447N, cause grounding the lamp-test pin should force all the outputs to GND, but for some reason they remain high. So the model is not switching the outputs.

As a test I replaced the first 7447N with a 4511B, added some 330Ω current limiting resistors and used this with a common cathode display. Running the simulation, I could get this digit to count something.
 
Hi E-Design,

could you tell me what software did you use for simulating the circuit? Thanks in advance.

best
 

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