Please help ,honeysuckle is sick?

I have a lovely honeysuckle which is about 12 foot high growing over a pegoda. Last year it developed some sort of disease , I treat it with organic disease spray and it seemed to get better although it didnt flower . This year it has flowered and the disease has returned , the stems have a grey covering on them and the leaves have brown / grey spots on and they fall off if you touch it . What do I do now , the poor thing is still flowering despite this , do I have to dig it up and start again . Many thanks in anticipation.