[Elecraft] K3 xmit problem

[Mike]

K3/100 #3539 with KAT3, KXV3, KTCX01-1, 2.8, 400, 250 filters. MCU 3.57, 
FPF 1.06, DSP1 2.45.

Transmitting into a dummy load, with nothing else in line, Antenna 1 
shows an SWR of 7.1-1 on 20 meters. On 10 meters, SWR is 1.1-1 and I 
have a HI CUR flag.
On all the other bands SWR is OK.

SWR on antenna 2 is OK on all bands.

What should I be looking at to fix this?

Thanks, Mike NF4L