Digital TV reception problem

[Maureen Carney]

This is going to sound real strange, but bear with me. I have a Teak indoor UHF digital antenna hooked up to a converter box. Until last night I got in all the major Boston and Providence stations with no problem. Since about 7 last night the only station I get in (no matter where I place the antenna) is WHDH - on VHF 7 and not UHF 42. Any ideas on what I can do?

Maureen