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Hello all. I have a problem with the VNAV, in the Boeing 747-400X.

I checked the legs page before taking off, and nothing seems wrong there.  Once I am airborn (just took off), I am turning on the autopilot. The LNAV and VNAV are armed. After a while, the speed only seems to be around 170 (right above "FLAPS UP"), and the altitude is about 4000 ft, which isn't matching to the altitudes and speeds that are on the legs page. Also, the altitudes (XX/XXX) on the legs page, becomes less and less.

I don't know what's going on.. I flew like that to the destination airport, and the altitudes/speeds didn't get any bigger. I could net set the flaps either, because the speed wasn't moving. I guess that there's something wrong with the VNAV. Any help?  :unsure:

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