Kaku plays his football in Israel with Ashdod FC and was recommended to the Trotters by the same agent who manufactored a deal to bring defender Tal Ben-Haim to the Reebok Stadium.
However despite an impressive trial showing in the game against Real Zaragoza and in numerous closed doors friendlies since then Wanderers boss Sam Allardyce feels his attempts to get the player permanently are fading due to medical problems.
"There is a problem with his medical and I am not sure it it will go through." he said.
On the other hand chairman Phil Gartside refused to pull the plug on the deal claiming that administrative problems and red tape were the reason why the move hadn't progressed.
"We're still negotiating with Kaku and hopefully it will happen. But we are talking about a Nigerian, with a Belgian passport, playing in Israel. There are bound to be problems" Gartside said
Meanwhile on loan striker El-Hadji Diouf will not be permitted to face Liverpool at the end of this month due to a new Premier League ruling which forbids players to play against the club they have been loaned from.