conflict in dymanics signs

[Dario Marrini]

Hi lilypond people,

I'm trying to transcribe an orchestral part; this is a solo Oboe part; there is a "cresc" ending in a "ff", but in the meanwhile there are other dynamics signs (_expression_?); I don't know how to combine the general crescendo with single dynamics _expression_ signs; lilypond warning me about a conflict, and it ignores the two 'decrescendo' signs; how to do for nesting _expression_ signs inside the longer and general crescendo? I would get it keeping the score original signs.

the original 

the lily output :

the code :

as'\(\! b\cresc\> g\! es\< g\! f\> es\! b\< es\! f2\) f-> f-> f->\ff

thanks all