Bread-Bakers v098.n074.2

I am having trouble with my bread rising. First rise is excellent but when
it puches down it leaves some stuck to side of pan and doesn't get a good
rise for the second one. I have tried adjusting density of dough, new
yeast, different yeast etc.. Any ideas or places I should look. I'm baking
in the Virgin Islands and didn't have this problem initially. 

Thanks! 
Lisa