Lost signal Overnight on 3 stations using MS-2000

[incognito2u]

About a month ago, I purchased a MS-2000 Omnidirectional Antenna and am very happy with the product. One day last week, I lost 3 over-the-air stations that I was originally receiving at over 95% signal level (Digital Channel 7, 11 and 13). When I try to view those channels, I get an message on my TV's signal strength meter of 0% signal level. I tried re-scanning my TV, I tried unplugging the power injector and rescanning, all with no resolution of my problem. I still am able to receive Channel 2,4,5,9,21,25,31,41,47,51 and 63. How should I approach this issue?
I Live in zip code 11565, my antenna is mounted on my Chimney approx 35 feet off the ground and nothing was changed since the antenna was originally installed.

[winegard]

It sounds as though for some reason your antenna has lost VHF side of the amplifier board built into the antenna head. Email a copy of your receipt to warranty @winegard.com and they will issue you an RMA number to use to return the MS-2000 under. Winegard will repair or replace the antenna to you at no charge under the normal 90 day warranty.

[incognito2u]

I will most certainly do so....I also noticed that the missing channels all broadcast in the VHF-hi band,

[incognito2u]

That was the problem!!!!
The replacement antenna works like a charm....all my channels are back up!
Thanks for your timely response to my issue.