[Yaesu] FT-450 6 Meter Problem

[Bruce]

Hello,

I just purchased an FT-450.

I connected it to my Waters 334 Dummy Load/Wattmeter,
which is rated at up to 1 KW at 230 Mhz, on the 100 watt
scale.

On the 160M to 10M bands, in SSB mode, everything is
normal.  The meter is near zero, you talk into the mic,
and the needle moves up the scale as you talk.

On the 6 meter band, still on SSB, the meter immediately
goes to almost full scale, and remains there, like you
had selected FM or CW, instead of SSB.  Changing modes
makes no difference.  Whatever mode you select, nothing
changes.  I went into the menu and changed RF Power to
10 watts, and that made no difference either.  I also
did a full reset, and that made no difference either.

Suggestions anyone?

Thank you,

Bruce WA8TNC