hailonet problem

I can not run the Hailo Raspberry Pi 5 Examples.

first, my version info is:
hailort-pcie-driver to version 4.18
HailoRT-CLI version 4.18.0
pyhailort 4.18 package with Python 3.11
hailo-tappas-core/stable,now 3.30.0-1 arm64

error: Error creating pipeline: gst_parse_error: no element “hailonet” (1)

then i upgrade to 4.20.0, my version info is:
hailort-pcie-driver to version 4.20
HailoRT-CLI version 4.20.0
pyhailort 4.20 package with Python 3.11
hailo-tappas-core/stable,now 3.30.0-1 arm64

error info:[HailoRT] [warning] Unsupported firmware operation. Host: 4.20.0, Device: 4.18.0
[HailoRT] [error] Operation 51 is not allowed when FW version in not supported. Host supported FW version is 4.20.0

How can i solve this problem, thx!