Interestingly enough, the CBS station (WISC) shows on TVFOOL.COM to be your second strongest channel in Watertown. The only thing I noticed, is the two channels you are having difficulty with are rather high up in frequency (channel 50 and channel 49). Its possible that your coax cable has enough attenuation at those high frequencies, as to render those channels problematic.
Before I paid someone to come out there, I would slap a decent preamp (channel master 7777) preamp on your mast. This should boost the signal enough to overcome your coax loss. You could also replace your cable with some low loss RG11 or RG6QS to further improve the signal from the antenna to the receiver.
Hopefully you have a rotor up there, as you should be able to get Milwaukee, and probably Chicago and Rockford Ill at night there.
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