LEADING Hongkong apprentice jockey Jimmy K. H. Ting has been replaced on five horses at Taipa tomorrow night following a mix-up that ended with the Royal Hongkong Jockey Club refusing him permission to ride in Macau. But Ting, apprenticed to Brian Kan Ping-chee, will still represent Hongkong in the Macau Apprentice Jockeys' Invitation race at Taipa on Saturday. He will have other rides on the twilight card. Ting, one winner short of losing his claim, looked set to become the first currently-licensed Hongkong jockey to ride in Macau when he was declared for five rides at tomorrow's meeting which sees claimers from other Asian Racing Conference countries, including Australia's brilliant Damien Oliver, in action. But yesterday the Macau Jockey Club issued official notification that Ting was being replaced on the mounts citing as the cause ''permission to ride refused by the RHKJC''. This was confirmed by the Chief Executive of the Jockey Club, General Guy Watkins, who said: ''The Macau Jockey Club asked us to nominate an apprentice for their Invitation Race and we did so. We also said that, as was our policy, he could accept other rides on that day. ''We were never asked about him riding on another race day. We had no knowledge that he was being asked to ride or being declared and we have simply followed our own policy. We permit visiting jockeys at our International Races to ride on that day - but not on the previous Wednesday.' The MJC Director of Racing, Peter Smiles, admitted that the RHKJC had not been asked about Ting riding at tomorrow night's meeting. ''It has been a misunderstanding - lines getting crossed. We did not specifically ask the RHKJC about the Thursday night meeting; nor did we ask any of the other Asian Racing Conference countries who have sent their riders. We thought they would be happy to get the experience of the track. ''With the benefit of hindsight, it would have been better if I had asked the RHKJC.''