Dying Boston ivy

nlj1520

I bought a Boston ivy plant recently and planted it against a south facing fence a couple of weeks ago. I planted it in a deeply dug hole with a little well rotted horse manure. The fence panel behind it had recently been replaced. After an initial period of growth, it seems to be dying from the top down. The leaves are brown, dry and crinkled and the new stems and tendrils are brown and dry.
OH thinks it is a chemical in the fence panel that has killed it, I have no idea, but wonder if the recent sun was too strong for it. Maybe I didn't water it enough? Anyone else any information about these climbers that might help me rescue it?
Thank you.