Cessna 152 air speed and ground speed indicator keep zero amount during taxi

I find find cessna 152 aerobat’s air speed and ground spped meter indcated incorrect information in SU4 1.6.34.0, when i start taxi to runway, but air speed and ground speed indicater have zero amount. Do you have same problem?

No issue here (free flight):

Have you removed the pitot cover ?

Thank you for your advise. My plane’s gauge is moving now.