CLS A340-300 air speed problem?

[DennisTrident 0]

Hi! I'm new to this forum.

I hope I can share my flying experiences with you and fly with you together (of course in FSX) !

 

Recently, I've got a annoying problem about my CLS Airbus A340-300.

I was flying a route from Hong Kong (VHHH) to Vancouver (CYVR) few days ago.

After taking off, I engaged the AUTO-THROTTLE , AP1, FD and ALT switches.

When the plane was climbing to the cruising altitude, 

I discovered a serious problem on the screen : the indicated air speed didn't match the true air speed!

Here is the screenshot :

 

 

The indicated air speed is about 440 knots, but the true air speed is only 264 knots! 

I've tried pressing Ctrl+X, X and B on the keyboard in order to calibrate the speed, but it didn't solve the problem...

What happened to my aircraft? Thanks for your help!  :mellow: