new zealander has not played since the super league leaders ' only defeat at warrington a month ago but coach brian mcdermott says his injury has now been properly diagnosed .
` we thought his biceps were the problem but he 's actually got a bit of floating tissue in his shoulder which he 's going to have cleaned out , ' mcdermott said .
' mcdermott had feared leuluai could be out for three months if he needed a bicep operation .