[Harp-L] 9 and 10 blow out

[TomEHarp@xxxxxxx]

i'm doing some songs that i'm doing some 9 and 10 blows on a c harp.my 
problem is they don't work. the harps are only 2 weeks old.they are marine bands.is 
there anyway i can repair this problem??


thanks for any help
tom in ct.