[R-sig-ME] GLMM, LRTs and post-hocs

[Kay Cecil Cichini]

hello everyone,

i did a GLMM with two fixed crossed (2 levels each) and one random  
factor. modelselection by LRTs gives no significance for the one fixed  
factor i'm mainly interested in, neither for the interaction with the  
second factor. however when i do post-hoc tests on the first factor  
within each level of the second i get significant effects at one of  
the two levels of the second factor, saying factor one is significant  
but only within level X of the factor two.

now i'm clueless how to proceed with this result, because LRTs tell me  
to dismiss the factor of interest but by pos-hocs i know in fact the  
one factor has an effect, however restricted on one level of the  
second factor...

any comments on this would be greatly appreciated,
kay