Agfa Anapurna XL2 issues with correx corrugated plastic board

[bunstar]

We have a fairly recently installed anapurna wide format xl2 uv curing printer, and aside from issues with the media transport belt, we are having problems getting the ink to adhere to fluted board like correx, mainly on solids, it looks ok, but when we trim the board, the ink either flakes away, or tears, you can almost pull the whole printed ink area of of the sheet of plastic so you have a cling film like printed sheet. We have tried a recommended solvent pre-wash, and antistatic treatment, as agfa said it could be static (?), but we have tried it on several different makes of board but all with the same problem. its only on this type of board. the agfa engineer helpfully told us that these machines were never that good at printing this kind of thing, i just walked away and left him. lying there.....

any ideas???